GE GYE18JBL How to use

31-9293
GYE18JBL
GYE18JML
GYE18JSL
GYE18JEM
GFE24JGKF
GFE24JMKF
GFE24JSKF
GFE24JBL
GFE26JBM
GFE26JEM
GFE26JMM
GFE26JSM
XFE26JSM
Technical Service Guide
September 2018
2017/2018 18, 24, 26 Cu. Ft. Bottom-
Freezer Refrigerators

– 2 –
Safety Information
IMPORTANT SAFETY NOTICE
The information in this service guide is intended for use by
individuals possessing adequate backgrounds of electrical,
electronic, and mechanical experience. Any attempt to repair a
major appliance may result in personal injury and property
damage. The manufacturer or seller cannot be responsible for the
interpretation of this information, nor can it assume any liability in
connection with its use.
WARNING
To avoid personal injury, disconnect power before servicing
this product. If electrical power is required for diagnosis or test
purposes, disconnect the power immediately after performing the
necessary checks.
RECONNECT ALL GROUNDING DEVICES
If grounding wires, screws, straps, clips, nuts, or washers used to
complete a path to ground are removed for service, they must be
returned to their original position and properly fastened.
GE Appliances, a Haier Company
Copyright © 2018
All rights reserved. This service guide may not be
reproduced in whole or in part in any form without written
permission from GE Appliances, a Haier Company.
For Warranty Information:
1. Go to http://products.geappliances.com
2. Search the model number.
3. Click on the Literature tab.
4. Click on Use and Care Manual.
5. Locate the Warranty page.
Warranty

– 3 – (Continued next page)
Table of Contents
Safety Information ........................................................................................................................2
Warranty .......................................................................................................................................2
Table of Contents..........................................................................................................................3
Safety Requirements....................................................................................................................9
Nomenclature ...............................................................................................................................10
Specications ...............................................................................................................................11
Installation ...................................................................................................................................12
Refrigerator Location ............................................................................................................12
Additional Specications.......................................................................................................12
Clearances ...........................................................................................................................12
Leveling ................................................................................................................................12
Leveling Refrigerator Doors..................................................................................................13
Operating Instructions .................................................................................................................14
Temperature Control.............................................................................................................14
Cooling System O󰀨...............................................................................................................14
°F to °C .................................................................................................................................14
Tone Volume.........................................................................................................................14
Door Alarm............................................................................................................................14
Lock ......................................................................................................................................15
Turbo Cool ............................................................................................................................15
Demo Mode ..........................................................................................................................15
Sabbath Mode ......................................................................................................................15
Air Flow.........................................................................................................................................16
Refrigerator Air Flow.............................................................................................................16
Freezer Air Flow ...................................................................................................................16
Ice Box Air Flow....................................................................................................................16
Cabinet Top ..................................................................................................................................17
Cabinet Top Components .....................................................................................................17
Hinge Covers........................................................................................................................18
Top Interface.........................................................................................................................18

– 4 – (Continued next page)
Top Door Hinges...................................................................................................................19
Humidity Sensor Board.........................................................................................................20
RJ45 Connector....................................................................................................................20
Ambient Thermistor...............................................................................................................20
FF Door Switches .................................................................................................................21
Door and Drawer Handles............................................................................................................22
Door Handles........................................................................................................................22
Freezer Drawer Handle ........................................................................................................22
Door and Drawer Gaskets............................................................................................................23
Door Bins......................................................................................................................................24
Dispenser (Left) Door Bins ...................................................................................................24
Right Door Bins ....................................................................................................................24
Dispenser Door ............................................................................................................................25
Dispenser Door Removal .....................................................................................................25
Left Center Hinge Removal ..................................................................................................25
Dispenser Board...................................................................................................................25
Dispenser Board Connector Locations.................................................................................26
Dispenser LEDs....................................................................................................................26
Dispenser Recess Components ...........................................................................................27
Ice Funnel.............................................................................................................................28
Paddle Switch.......................................................................................................................28
Duct Door Motor ...................................................................................................................29
Duct Door .............................................................................................................................29
Recess Heater......................................................................................................................29
Articulating Mullion................................................................................................................30
Water Tank Cover .................................................................................................................31
Water Tank............................................................................................................................31
Dual Valve.............................................................................................................................31
Diodes ..................................................................................................................................32
Ice Box Compartment...................................................................................................................33
Ice Box Components ............................................................................................................33
Ice Box Door.........................................................................................................................34
Ice Bucket.............................................................................................................................34

– 5 –
Ice Box Port Gaskets............................................................................................................34
Collar Port.............................................................................................................................35
Icemaker Access Cover........................................................................................................35
Ice Box Thermistor................................................................................................................35
Auger Motor ..........................................................................................................................36
Icemaker...............................................................................................................................36
Fill Tube ................................................................................................................................37
Fill Tube Heater ....................................................................................................................37
Right Door ....................................................................................................................................38
Right Door Removal .............................................................................................................38
Right Center Hinge Removal................................................................................................38
Door - Top.....................................................................................................................................39
Door - Top Component Locator ............................................................................................39
Top Door Bumper..................................................................................................................39
Closure Cam.........................................................................................................................39
Top Hinge Bushing ...............................................................................................................39
Door - Bottom ...............................................................................................................................40
Door - Bottom Component Locator.......................................................................................40
Bottom Door Bumper............................................................................................................40
Bottom Hinge Bushing..........................................................................................................40
Door Stop .............................................................................................................................40
Water Filter Cartridges .................................................................................................................42
Water Filter (MFWP).............................................................................................................43
Water Filter (XWP)................................................................................................................43
Refrigerator Compartment............................................................................................................44
Refrigerator Component Locator ..........................................................................................44
Adjustable Shelves ...............................................................................................................45
Climate Zone Pans ...............................................................................................................45
Pan Covers...........................................................................................................................45
Mullion Striker.......................................................................................................................46
Upper LED Housing..............................................................................................................46
Refrigerator (FF) Thermistor.................................................................................................47
Lower LEDs ..........................................................................................................................47
(Continued next page)

– 6 –
Air Tower...............................................................................................................................48
Damper.................................................................................................................................49
MWFP Manifold ....................................................................................................................49
XWF Manifold .......................................................................................................................51
Freezer Drawer ............................................................................................................................52
Upper Basket........................................................................................................................52
Bottom Basket ......................................................................................................................52
Drawer Gasket......................................................................................................................53
Drawer Front Removal .........................................................................................................53
Freezer ........................................................................................................................................55
Freezer Component Locator.................................................................................................55
Upper Basket Slides .............................................................................................................56
Pinion Cross Bar...................................................................................................................56
Pinion Gears.........................................................................................................................56
Lower Basket Slides .............................................................................................................57
Slide Holders ........................................................................................................................57
Freezer Thermistor ...............................................................................................................57
Freezer Drawer Switch .........................................................................................................58
Freezer LEDs .......................................................................................................................58
Evaporator Cover .................................................................................................................59
Evaporator Fan.....................................................................................................................61
Evaporator Components ..............................................................................................................62
Evaporator Component Locator ...........................................................................................62
Icemaker Blower Fan............................................................................................................63
Evaporator Thermistor..........................................................................................................63
Defrost Thermostat...............................................................................................................64
Defrost Heater ......................................................................................................................65
Evaporator ............................................................................................................................65
Thermistors...................................................................................................................................66
Thermistor Check Points ......................................................................................................66
Thermistor Replacement ......................................................................................................66
Defrost Operation .........................................................................................................................67
Adaptive Defrost ...................................................................................................................67
(Continued next page)

– 7 –
Pre-Chill................................................................................................................................67
Defrost Heater Operation .....................................................................................................67
Dwell.....................................................................................................................................67
Post Dwell.............................................................................................................................67
Abnormal Defrost..................................................................................................................67
Cabinet - Rear ..............................................................................................................................68
Cabinet - Rear Component Locator......................................................................................68
Main Board ...........................................................................................................................69
Main Board Connector Locations .........................................................................................70
Connector Locations (continued)..........................................................................................71
Machine Compartment .................................................................................................................72
Machine Compartment Cover...............................................................................................72
Machine Compartment Component Locator ........................................................................72
Isolation Valve.......................................................................................................................73
Drain Tube ............................................................................................................................74
Condenser Fan.....................................................................................................................74
PTCR Relay/Overload ..........................................................................................................76
Capacitor ..............................................................................................................................77
Compressor ..........................................................................................................................77
Drier......................................................................................................................................78
Condenser ............................................................................................................................78
Refrigeration System....................................................................................................................79
Replacing Sealed System Components.......................................................................................80
Evacuation and Charging Procedures..................................................................................80
Lokring..........................................................................................................................................81
Lokring Rules........................................................................................................................81
Process Tube Joint ...............................................................................................................81
Drier Joints ...........................................................................................................................82
Evaporator Joints..................................................................................................................82
Compressor Joints................................................................................................................83
Condenser Joints..................................................................................................................83
Service Mode ...............................................................................................................................84
Service Mode Tests ..............................................................................................................85
(Continued next page)

– 8 –
Schematic Diagram ......................................................................................................................86
Index.............................................................................................................................................87

– 9 –
Safety Requirements
Prior to disassembly of the refrigerator to access components, GE
Factory Service technicians are REQUIRED to follow the Lockout /
Tagout (LOTO) 6 Step Process:
Step 1
Plan and Prepare
Step 4
Apply LOTO device and lock
Step 2
Shut down the appliance
Step 5
Control (discharge) stored
energy
Step 3
Isolate the appliance
Step 6
“Try It” verify that the appliance
is locked out
GE Factory Service Employees are required to use safety glasses with side shields, safety gloves and
steel toe shoes for all repairs.
Steel Toed Work Boot
Electrically Rated Glove and
Dyneema® Cut Resistant Glove
Keeper
Dyneema®Cut Resistant
Glove
Cut Resistant Sleeve(s)
Plano Type Safety Glasses
Brazing Glasses Prescription Safety Glasses
Safety Glasses must be
ANSI Z87.1-2003 compliant

– 10 –
Nomenclature
The Mini Manual is
located under the
right hinge cover.
The Model Serial
ID Tag is located
on the left side
of the refrigerator
compartment.
G Y E 1 8 J B L A F T S
Brand
G: GE Appliances
X: Crosley
Conguration
F: Full Depth
Y: Counter Depth
Energy
E: E-Star
Capacity
18: 17.5 Cubic Feet
24: 23.8 Cubic Feet
26: 25.5 Cubic Feet
Feature Pack
J: Deluxe
Model Year:
K: 2016
L: 2017
M: 2018
Color
B: Black
D: Black Slate
E: Slate
S: Stainless Steel
T: Black Stainless
W: White
Door Swing
F: French
Handle Color
B: Black
S: Stainless Steel
W: White
Engineering Digit
Finish
B: Black Stainless
G: High Gloss
M: Slate
S: Stainless Steel
Serial Number
The rst two characters of the serial number identify the month and year of manufacture. The letter
designating the year repeats every 12 years.
Example: FL123456S = March, 2018
A – JAN
D – FEB
F – MAR
G – APR
H – MAY
L – JUN
M – JUL
R – AUG
S – SEP
T – OCT
V – NOV
Z – DEC
2024 – Z
2023 – V
2022 – T
2021 – S
2020 – R
2019 – M
2018 – L
2017 – H
2016 – G
2015 – F
2014 – D
2013 – A
Model Number
The nomenclature breaks down and explains what the letters and numbers mean in the model number.

– 11 –
Specications
NO LOAD PERFORMANCE
CONTROL POSITION 0 / 37°F and
AMBIENT TEMPERATURE OF 65°F 90°F
Fresh Food, °F 38 - 40 36 - 38
Frozen Food, °F 0 - 1 0 - 2
Percent Running Time 25 - 50 50 - 80
REFRIGERATION DIAGNOSIS
To access the low pressure side of the system,
install a WJ56X61 valve only on the process
tube extending from the compressor case.
REFRIGERATION SYSTEM
Minimum Equalized Pressure
@ 70°F 40/45 PSIG
@ 90°F 48/60 PSIG
R134a Refrig. Chg.
18 cu. ft. models:
24 cu. ft. models:
26 cu. ft. models:
4.00 ounces
4.25 ounces
4.48 ounces
Electrical Shock Hazard
Death or serious injury can result from failure
to follow these instructions.
• Service by a qualied service technician
only.
• Disconnect power before servicing this
product.
• Reconnect all grounding devices after
service.
• Replace all parts and panels before
operating.
WARNING
ELECTRICAL SPECIFICATIONS
Max Defrost Control
w/No Door Openings 96 hrs @ 40 min
Evap Defrost Thermostat
Defrost Heater
Fill Tube Heater
Mullion Heater
Recess Heater
Duct Door Heater
Duct Door Motor
Damper Motor
Isolation Valve
Icemaker Valve
Dispenser Valve
Compressor Windings
Ice Blower Fan
Evaporator Fan
Condenser Fan
Auger Motor
Icemaker
95 - 65°F
120 VAC / 33Ω
13 VDC / 136Ω
13 VDC / 24Ω
13 VDC / 100Ω
120 VAC / 1100Ω
13 VDC / 15Ω
415Ω
120 VAC / 320Ω
120 VAC / 320Ω
120 VAC / 120Ω
120 VAC / 4Ω & 6Ω
6-13 VDC
8-11 VDC
9-10 VDC
120 VAC
120 VAC

– 12 –
The product should not be installed in the
following locations:
• Where the temperature will go below 60°F
(16°C) because it will not run often enough to
maintain proper temperatures.
• Where the temperature will go above 100°F
(37°C) because it will not perform properly.
• In a location exposed to water (rain, etc.) or
direct sunlight.
• The refrigerator should be installed on a oor
strong enough to support it fully loaded.
NOTE: Not recommended for installation on
carpeted ooring.
Installation
These refrigerators should have the following
clearances for ease of installation, proper air
circulation, and enough room for plumbing and
electrical connections.
• Sides: 1/8 inch
• Top (Cabinet/Hinge Cover): 1 inch
• Back: 2 inches
• 115 volt 60Hz, 15 or 20-amp power supply is
required.
• An individual properly grounded branch circuit
or circuit breaker is recommended.
NOTE: A GFI (Ground Fault Interrupter) is not
recommended.
• It is required that the refrigerator be plugged
into a grounded 3-prong outlet.
• Ground prong should not be removed.
• Use of a 2-prong adapter or an extension
cord is prohibited.
• Frayed or damaged power cord should
immediately be replaced.
WARNING
Electrical Shock Hazard
The refrigerators have adjustable legs at the front
corners. The leveling legs should be set so the
refrigerator is rmly positioned on the oor and
the front is raised enough that the doors close
easily when opened about halfway.
To Adjust the Leveling Legs:
• Turn the legs clockwise to raise or
counterclockwise to lower the refrigerator.
Refrigerator Location
Additional Specications
Clearances
Leveling

– 13 –
The refrigerators door height can be adjusted on both doors. Prior to adjusting the door height, the
refrigerator should be leveled for best results. After the cabinet has been properly leveled, a 1/4-in.
Allen wrench can be used to turn the pin in the bottom hinges of the refrigerator doors.
To Adjust the Door Height:
• Turn the left or right adjustment pin clockwise to raise, or the the adjustment pin counterclockwise to
lower the corresponding door.
Adjustment Pin
Locations
Leveling Refrigerator Doors

– 14 –
Operating Instructions
The temperature display will only show the set
temperatures of the refrigerator.
Default freezer temperature is 0°F. Freezer
temperature can be set to -6°F to 6°F. To change
the temperature setting press the Freezer pad to
display the current set temperature and "wake up"
the display. Then press the Freezer pad again
to increase the set temperature. Once the set
temperature reaches 6°F the next press of the
Freezer pad will cycle the set temperature back
to -6°F.
The default refrigerator temperature is 37°F.
Refrigerator temperature can be set to 34°F
to 44°F. To change the temperature setting,
press the Fridge pad to display the current set
temperature and "wake up" the display. Then
press the Fridge pad again to increase the set
temperature. Once the set temperature reaches
44°F the next press of the Fridge pad will cycle
the set temperature back to 34°F.
The actual temperature will vary from the set
temperature based on factors such as door
opening, amount of food, defrost cycling and
room temperature.
NOTE: Frequent door openings or a door left
open for periods of time may increase the internal
temperature of the refrigerator compartment
temporarily.
Press the Alarm pad to toggle the door alarm
between ON and OFF states. The alarm will
sound if any door or drawer is left open for more
than two minutes. Once the door or drawer is
closed, the alarm will stop.
Door alarm volume or the sound in response to
pressing a pad cannot be changed.
To change the temperature display between
Fahrenheit and Celsius, press and hold Alarm
and Freezer for 5 seconds. Temperature display
can also be changed using Service Mode Test t14
(see Service Mode Tests in the in the Service
Mode section of this service guide).
To turn o󰀨 the cooling system, press and hold
both Fridge and Freezer pads until the display
shows OFF. To turn the cooling system on, press
either Fridge or Freezer pads and the display will
show the set temperature.
Temperature Control Cooling System O󰀨
°F to °C
Tone Volume
Door Alarm

– 15 –
Sabbath Mode is designed to eliminate changes
in operations of the refrigerator due to human
interactions. This mode is entered by the
consumer during observance of the Sabbath or
during specic religious holidays.
While in the Sabbath Mode, the appliance will still
operate normally. However, the appliance will not
respond to any consumer actions.
While in the Sabbath Mode, it may be noticed
that the fan is running when the door is opened;
however, this is not a result of any interactions
with the refrigerator. The fan will operate at
random times. The defrost heater will continue to
defrost the appliance and defrost will be activated
on a timer. The defrost heater will not defrost
as a result of door openings or any consumer
actions.
DISPLAYS, ALARMS and LIGHTS: The main
temperature control displays will be deactivated;
therefore, they will not be lit, sound a tone or
operate when touched. Door alarms will be
disabled. Lights will always be on but at a dim
light setting.
To turn on Sabbath Mode, press and hold the
Lock and Light pads until the display shows SA
briey before going blank. Repeat the process to
turn o󰀨 Sabbath Mode. Temperature set point will
be displayed. Sabbath mode will automatically
exit four days after being entered.
TurboCool™ rapidly cools the refrigerator
compartment in order to more quickly cool foods.
Use TurboCool™ when adding a large amount
of food to the refrigerator compartment, putting
away foods after they have been sitting out at
room temperature, or when putting away warm
leftovers. It can also be used if the refrigerator
has been without power for an extended period.
To set the TurboCool™, press the Alarm pad for
3 seconds. The display will show "tC".
NOTE: The refrigerator temperature cannot
be changed during TurboCool™. The freezer
temperature is not a󰀨ected during TurboCool™.
When opening the refrigerator door during
TurboCool™, the fans will continue to run if they
have cycled on.
Demo Mode deactivates compressor, fans, and
defrost heater. All keys on the control panel are
functional. The display will show and blink 888
then switch to displaying the set temperature. To
enter Demo Mode press Lock, Cubed, and Light
pads simultaneously for 5 seconds. To exit Demo
Mode, cycle power to the refrigerator. Demo
Mode can also be entered from Service Mode
Test t1.
The dispenser pads can be locked to prevent
inadvertent presses or to keep children from
making selections/changing settings. Press and
hold the Lock pad for 3 seconds to lock out ice
and water dispenser and all other controls. Press
and hold Lock to unlock the controls.
Lock
Turbo Cool
Demo Mode
Sabbath Mode

– 16 –
Air Flow
Cold air is circulated into the compartment by
the evaporator fan. When cooling is required,
the main board opens the damper and turns on
the fan to push cold air from the evaporator up
and out the air tower. The air circulates through
the refrigerator compartment and is pulled back
to the freezer below the evaporator by the way
of the air return passage behind the evaporator.
That warm moist air then gets pull back across
the evaporator coil to extract the heat and
moisture.
Cold air is circulated in the freezer by the
evaporator fan. When cooling is required, the
main board turns on the fan to circulate cold air
from the evaporator through the evaporator cover.
The air is pulled back to the evaporator through
two ducts built into the bottom of the evaporator
cover. That air then gets pulled back across the
evaporator coil to extract the heat and moisture.
Freezer air is circulated into the ice box by the
ice blower fan located in the freezer. The blower
pushes freezer air up and through the top ice
box air duct. Air in the ice box is then forced
out through the return air passage (bottom air
duct) to mix and be circulated with the rest of the
freezer air.
Cold Air
Mixed Air
Air Return To
Evaporator
Refrigerator
Freezer
Ice Blower Fan
Freezer
Refrigerator Air Flow
Freezer Air Flow
Ice Box Air Flow

– 17 –
Cabinet Top
*Top interface shown in service position.
Left Door
Closure
Left Door
Hinge
Left FF
Door Switch
RJ45 and Humidity
Sensor Board
Right FF
Door Switch
Ambient
Thermistor
Top Interface*
Door Water
Line
Left Closure
Spring
Right Door
Closure
Right Door
Hinge
Right Closure
Spring
Switch Harness
Connector (AC)
Harness
Connector (DC)
AC and DC Door
Connections
Cabinet Top Components

– 18 –
Left and right hinge covers need to be removed
in order to access the components under the top
interface and to remove the doors.
Hinge Cover Removal
1. Remove one Phillips-head screw for the
desired hinge cover.
2. For the left hinge cover, use a at-blade
screwdriver inserted into the slot on the left
side of the hinge cover and pry to the right
while lifting up on the cover. For the right
hinge cover, proceed to next step.
3. Lift the hinge cover up to remove the cover
from the hinge.
The top interface houses the refrigerator door
switches, ambient thermistor, switch harness,
DC harness, and RJ45 connector and humidity
sensor board. If the interface needs to be
replaced, all of the components under the
interface will come as part of the assembly. If
a component under the interface needs to
be replaced, that component can be ordered
separately. To service any of the components
under the top interface, the top interface
must be put into the service position (see
the Top Interface callout under Cabinet Top
Components in this section of this service guide).
Top Interface Removal
1. Remove the left and right hinge covers.
2. Remove two Phillips-head screws.
3. Flip the top interface back (put into service
position).
4. Disconnect the AC and DC harness
connectors.
5. Remove the interface from the top of the
cabinet.
Hinge Covers Top Interface

– 19 –
Door hinges incorporate a spring loaded closure.
The closure arms roll over cams mounted to the
top of the refrigerator doors to close the doors
once the doors are a couple inches from closing.
The closure arm and hinge come as an assembly
but the spring can be ordered separately.
Top Left Door Hinge Removal
NOTE: Leave the doors shut during this process
to prevent damage to doors or damage to the
consumer's property.
1. Remove the left and right hinge covers.
2. Put the top interface into the service position
(see Top Interface Removal under Top
Interface in this section of this service guide).
3. Disconnect three door wiring connectors
tucked into the top of the cabinet.
4. Disconnect the door water line from the 90°
union located behind the refrigerator and pull
the water line from the cabinet through the
front.
5. Remove the 1/4-in. hex-head screw mounting
the ground wire to the hinge.
6. Remove three 5/16-in. hex-head screws and
lift the hinge from the cabinet.
Top Right Door Hinge Removal
NOTE: Leave the doors shut during this process
to prevent damage to doors or damage to the
consumer's property.
1. Remove the right hinge cover.
2. Remove three 5/16-in. hex-head screws and
lift the hinge from the cabinet.
Top Door Hinges

– 20 –
The ambient thermistor is located under the top
interface. The thermistor clips into the backside
of the top interface and is used to determine the
o󰀨set temperature of the refrigerator.
The o󰀨set temperature is the temperature the
main control targets. Air temperature inside a
compartment is typically lower than the thermistor
reading due to cabinet thermistors proximity to
cabinet walls. The main control increases the
o󰀨set temperature when the ambient temperature
increases.
To access the thermistor, place the top interface
in the service position (see Top Interface
Removal, under Top Interface in this section of
the service guide).
To test or replace the thermistor, follow the steps
in the Thermistors section of this service guide.
The Humidity board is located under the center
of the top interface. The humidity sensor on
the board provides the main board with relative
humidity percentages based on the feedback
voltage (see table below). The feedback voltage
will range between 1 to 4 VDC. The relative
humidity percentage is used to determine the
articulating mullion heater on time (the greater the
humidity, the greater the heater run time).
Relative Humidity Voltage (DC)
20% 1.5 V
50% 2.3 V
80% 3.1 V
Humidity Sensor Board Diagnosing
Before changing the board, ensure the proper
voltages are going to the humidity board.
Humidity sensor voltages can be checked at the
humidity board or main board.
Connector on Humidity Board
• Orange to tan/black: 13 VDC
• Orange to white: 13 VDC
• White or tan/black to red/white: 5 VDC
• Yellow to red/white: 1 - 4 VDC
NOTE: 0 or 5 VDC from yellow to red/white
may indicate a bad humidity sensor. Replace the
humidity board if there are no open or shorted
wires to the board.
Connectors on Main Board
• J4 pin 4 (orange) to J4 pin 5 (tan/black): 13
VDC
• J4 pin 4 (orange) to J2 pin 3 (white/silver):
13 VDC
• J5 pin 5 (red/white) to J4 pin 5 (tan/black) or
J2 pin 3 (white/silver): 5 VDC
• J5 pin 5 (red/white) to J5 pin 6 (yellow/
white): 1 - 4 VDC
NOTE: 0 or 5 VDC from J5 pin 5 to J5 pin 6 may
indicate a bad humidity sensor. Replace the
humidity board if there are no open or shorted
wires to the board.
The RJ45 connector is mounted to the humidity
sensor board inside the top interface and is only
available with the humidity sensor board. The
RJ45 connector is the access point to update
software using a software update module (SUM)
or connect a service diagnostic tool.
Humidity Sensor Board Removal
1. Place the top interface in the service position
(see Top Interface Removal, under Top
Interface in this section of the service guide).
2. Remove one 1/4 in. hex-head screw and
disconnect the wiring harness.
Humidity Sensor Board
RJ45 Connector
Ambient Thermistor