Maytag MED5900TW0 User manual

TECH SHEET - DO NOT DISCARD PAGE 1
FOR SERVICE TECHNICIAN’S USE ONLY PART NO. W10112987A
WARNING
Electrical Shock Hazard
Disconnect power before
servicing.
Replace all parts and
panels before operating.
Failure to do so can result
in death or
electrical shock.
IMPORTANT
Electrostatic Discharge (ESD)
Sensitive Electronics
Do not open package until it is time to
install the electronic board.
ESD problems are present everywhere.
ESD may damage or weaken the
electronic board. The new board may
appear to work well after repair is
finished, but failure may occur at a later
date due to ESD stress.
■Use an anti-static wrist strap. Connect
wrist strap to green ground connection
point or unpainted metal in the
appliance
-OR-
Touch your finger repeatedly to a green
ground connection point or unpainted
metal in the appliance.
■Before removing the part from its
package, touch the anti-static bag to a
green ground connection point or
unpainted metal in the appliance.
■Avoid touching electronic parts or
terminal contacts; handle electronic
board by edges only.
■When repackaging failed electronic
board in anti-static bag, observe above
instructions.
DIAGNOSTIC GUIDE
Before servicing, check the following:
■Make sure there is power at the wall
outlet.
■Has a household fuse blown or circuit
breaker tripped? Time delay fuse?
■Is dryer vent properly installed and
clear of lint or obstructions?
■All tests/checks should be made with
aVOM (volt-ohm-milliammeter) or
DVM (digital-voltmeter) having a
sensitivity of 20,000 Ωper volt DC or
greater.
■Check all connections before
replacing components. Look for
broken or loose wires, failed terminals,
or wires not pressed into connectors
far enough.
■A potential cause of a control not
functioning is corrosion on
connections. Observe connections
and check for continuity with an
ohmmeter.
■Connectors: Look at top of connector.
Check for broken or loose wires.
Check for wires not pressed into
connector far enough to engage metal
barbs.
■Resistance checks must be made with
dryer unplugged or power
disconnected.
LESS DRY TEST
Begin with a fully assembled, empty dryer
with clean lint screen. Be sure dryer is
connected to a known good power source.
1. Set the following configuration:
■Door - must be closed
■Timer - Less Dry
■Temperature switch - High
■End of Cycle Signal switch - Louder
2. Press the Push to Start (PTS) switch.
After approximately 16 seconds, the
Timer will start to advance to the Off
position. If this function does not occur,
proceed to the Diagnostic Test.
DIAGNOSTIC TEST
This diagnostic test allows factory/service
personnel to test and verify all inputs to the
electronic control. The basic operation of this
test is to notify the operator with an audible
beep every time the status of an input to the
control changes state.
This test is performed with a fully assembled
dryer, connected to a known good power
source.
Activating the Test Mode
1. Set the following configuration:
■Door - must be open
■Temperature switch - Air Fluff
■End of Cycle Signal switch - Louder
■Timer - Timed Drying or Sensor Drying
selection
2. Turn the Wrinkle Prevent switch from Off
to On three times within a five second
period. A single beep, a pause, then a
single beep will sound to indicate that the
test mode is activated.
NOTE: If any of these initial conditions are
not satisfied, the control will not enter the
test mode.
Test Mode Functionality
When the control is in test mode, every input
change of state will result in an audible beep
(with the exception of the End of Cycle Signal
switch). This includes:
■Door switch
■Moisture Sensor (short/open Sensor
will result in a beep)
NOTE: A moistened finger or damp
cloth may also be used.
■Temperature switch
■Wrinkle Prevent switch
■Push to Start (PTS) switch (with the
door switch closed)
■Timer (any cam input change will result
in a beep)
NOTE: Timer will advance during test.
If any of the inputs do not result in a beep,
proceed to the corresponding component
tests, beginning on page 4.

PAGE 2 TECH SHEET - DO NOT DISCARD
PART NO. W10112987A FOR SERVICE TECHNICIAN’S USE ONLY
Red
Blue White Green-
Yellow
Red
Black Violet
Main Winding
Start Winding
Pluggable Drive Motor Switch
1
1
14
1
5
5
4
PS02
PS03
PS01
PS04
7
8
PT-1
Electronic Control Assembly
W
RB
U
PT-1 V
B
K
DATE
Timer
Red-White
Red-White
Red-
White
Red-
White
D.C. Heater Relay
1M 2M 3M 5M 6M
= Contacts closed
Contacts
Function
Start
Run
Centrifugal Switch (Motor)
Drum Size:
7 cubic feet
Drum Speed:
48 ± 3 RPM CW
Blue
Blue
Pink-
Black
Pink-
Black
Motor Relay
Timer
BU BK R V W
Wire Colors
Blue Black Red Violet White
Brown
Brown
Brown
Brown
A.C. Heater Relay
120 VOLTS
240 VOLTS
L1 LINE – BK – LINE L2R
W–NEUTRAL
2M
1M
DOOR
SWITCH
DRIVE MOTOR
1/3 H.P.
5M
6M
THERMISTOR
10 k
Ω
BK DL
5400 WATT
2700 WATT
EACH LEG
ELECTRONIC CONTROL
NEUTRAL
TERMINAL
LINKED TO
CABINET
CENTRIFUGAL SWITCH
THERMAL FUSE
196 °F (91°C)
HIGH LIMIT
THERMOSTAT
180°F (82°C)
TIMER
PT-1
DOOR
DRUM LAMP
MTR
P1-1
TIMER
T2
P1-2
MOIST.
T3
P1-3
TEMP.
T4
P1-4
NEUTRAL
P2-5
P2-6
SENSOR
P2-4
P2-3
P2-1
WRINKLE
PREVENT
FABRIC
P3-6
P3-5
FS-1
FS-2
FS-3
WPREVENT
SIGNAL
P3-4
P3-3
SOFT
HEATER
RELAY
P3-2
HEATER
HI
3M
14
3
2
1
4
5
P3-8
2
1
4
P3-1
HEATER
LOW
P3-7
W
BU
BK
R-W
BK
BU
V
R
W
BU
R-W
COM
NO
OR
BU
Y- R
W
RW-R
BU
G-Y
G-Y
W
R-W
R-W
GY
W
T
V
OR
T- W
W-BK
TCO
310°F
(154°C)
MODEL
LOUD
BU
MOIST
GND
P2-7
BU
PK-BK
PTS
MOTOR
RELAY
PK-BK
BU
BK BU
BK
COM
NO
MOTOR
START
START
SENSE
BU-BK P1-5
R-W
AC COIL
HEATER RELAY
P4-4
L1-RTN
P4-3
120 VAC RLY DR. P4-2
MODEL
P4-1
MODEL
BR
BR
NC
BK
R
R
BU
W
R
R
W
BR
BR
MAIN
2.4–3.6
START
2.4–3.8
48
VDC
48 VDC
Electric Dryer Wiring Diagram

TECH SHEET - DO NOT DISCARD PAGE 3
FOR SERVICE TECHNICIAN’S USE ONLY PART NO. W10112987A
240 VOLTS
120 VOLTS
L1 LINE – BK R – LINE L2
2M
1M
DOOR
SWITCH
DRIVE MOTOR
1/3 H.P.
MAIN
2.4–3.6
START
2.4–3.8
5M
6M
ELECTRONIC CONTROL
CENTRIFUGAL SWITCH
THERMAL FUSE
196 °F (91°C)
TIMER
MTR
HEATER
LOW
PT-1
P1-1
DOOR
TIMER
P2-6
PTS
MOTOR
RELAY
P2-7
P3-2
MOTOR
START
3M
START
SENSE
P1-5
W
BU
BK BK
W – NEUTRAL
BU
BU
BU
BU
BU
BU
BU
W
NEUTRAL
TERMINAL
LINKED TO
CABINET
PK-BK
PK-BK
BK
BK
COM
NO
BU
BU-BK
W
BU
MOTOR STRIP CIRCUIT
120 VOLTS
240 VOLTS
2M
1M
5M
6M
THERMISTOR
10 kΩ
ELECTRONIC CONTROL
THERMAL
CUT-OFF
(TCO)
310 °F (154°C)
NEUTRAL
TERMINAL
LINKED TO
CABINET
CENTRIFUGAL SWITCH
HIGH LIMIT
THERMOSTAT
180°F (82°C)
TEMP.
NEUTRAL
P2-3
P2-1
HEATER
RELAY
P3-2 P4-1
HEATER
HI
NC
3M
P3-1 P4-2
HEATER
LO W L1-RTN
R
R-W
COM
NO
RW-R
R-W
R-W
W
5400 WATT
2700 WATT
EACH LEG
R-W
AC COIL
HEATER RELAY
BR
BR
BR
BR
48 VDC
120 VAC
RLY DR
W – NEUTRAL
R – LINE L2
L1 LINE – BK
HEATER STRIP CIRCUIT
120 VOLTS
ELECTRONIC CONTROL
NEUTRAL
TERMINAL
LINKED TO
CABINET
MOIST
GND
MOIST.
NEUTRAL
P2-5
SENSOR
P2-4
P2-1
BK
Y-R
G-Y
G-Y
W
MTR
P1-1
BU
TIMER
PT-1
TIMER
BK
BU
W – NEUTRAL
L1 LINE – BK
MOISTURE SENSOR STRIP CIRCUIT

PAGE 4 TECH SHEET - DO NOT DISCARD
PART NO. W10112987A FOR SERVICE TECHNICIAN’S USE ONLY
A.C. Heater
Relay
A.C. Heater
Relay Screws
(2)
D.C. Heater
Relay
D.C. Heater
Relay Screws
(2)
Timer Electronic
Control
Asm
D.C.
Motor
Relay
D.C. Motor
Relay Screws
(2)
Console Shell
Screws,
R.H. Side (2)
Push to Start
(PTS)
Switch
Ground
Screw
Timer Screws
(2)
Control
Bracket
Wrinkle Prevent
Switch
Signal
Switch
Console
Shell
Temperature
Switch
Console Shell
Screws,
L.H. Side (2)
Component Location
COMPONENT TESTS
Supply Connections Test
This test assumes that proper voltage is
present at the outlet, and visual inspection
indicates that the power cord is securely
fastened to the terminal block.
1. Unplug dryer or disconnect power.
2. Remove the cover plate from the back of
the dryer.
3. With an ohmmeter, check for continuity
between the neutral (N) terminal of the
plug and the center contact on the
terminal block. See illustration below.
➔If there is no continuity, replace the
power cord and test the dryer.
➔If there is continuity, go to step 4.
4. In a similar way, check which terminal of
the plug is connected to the left-most
contact on the terminal block and make
a note of it. This will be L1 (black wire) in
the wiring diagram. See illustration
above.
COM
NL1
Power Cord
Plug Te r m i nal Block
Plug-to-terminal connections for electric
dryer.
➔When this is found, go to step 5.
➔If neither of the plug terminals have
continuity with the left-most contact of
the terminal block, replace the power
cord and test the dryer.
5. Access the electronic control without
disconnecting any wiring to it.
6. With an ohmmeter, check for continuity
between the L1 terminal of the plug
(found in step 4) and BK (black wire)
terminal on the timer.
➔If there is continuity, go to step 7.
➔If there is no continuity, check that
wires to the terminal block are
mechanically secure. If so, replace or
repair the main wire harness and test
the dryer.
7. Check for continuity between the neutral
(N) terminal of the plug and P2-1 (white
wire) on the electronic control.
➔If there is continuity, go to the Timer
Test.
➔If there is no continuity and the
mechanical connections of the wire
are secure, replace or repair the main
wire harness.
Timer Test
Perform the diagnostic test on page 1 to
determine that the timer motor advances
(should run continuously). If the timer does
not advance or fails the diagnostic test:
1. Unplug dryer or disconnect power.
2. Remove the wires from timer terminals.
3. Check the timer motor resistance and
timer switching. The resistance (BU to
PT-1) should be 3 kΩ(±2). Use the timer
encoding table below for switching
conductivity, and refer to timer illustration
on page 2.
Reference contact continuity to timer - BK.
Timer Encoding Table
TIMED DRYING MODE
Timer
Contacts Timed Drying Cool Down Wrinkle Prevent Off
W to BK O O O O
R to BK X X O O
V to BK O X X O
BU to BK X X X O
SENSOR DRYING MODE
Timer
Contacts Jeans Energy Preferred Less Dry Wrinkle Prevent Off
W to BK X X O O O
R to BK O O O O O
V to BK X O O X O
BU to BK X X X X O
O = OPEN X = CLOSED
Motor Test
1. Unplug dryer or disconnect power.
2. Open the dryer door.
3. Measure resistance between the motor
relay common (COM) terminal and the
P2-6 terminal on the electronic control.
1 to 6 Ωshould be measured.
➔If resistance measurements are
outside 1 to 6 Ω, perform the Thermal
Fuse Test and Door Switch Test,
page 5; and check harness continuity.
If they test good, replace the motor.

TECH SHEET - DO NOT DISCARD PAGE 5
FOR SERVICE TECHNICIAN’S USE ONLY PART NO. W10112987A
4. Measure resistance between the motor
relay common (COM) terminal and
ground. A high resistance (open) should
be measured.
➔If it does not, perform the Thermal
Fuse Test and Door Switch Test and
check harness continuity. If they test
good, replace the motor.
Door Switch Test
1. Unplug dryer or disconnect power.
2. Check door switch continuity. Neutral to
P2-6 on the electronic control should
read closed with the door closed, and
open with the door open.
3. Otherwise, verify harness continuity.
➔If no continuity, repair or replace the
harness.
➔If harness is good, replace the door
switch.
Temperature Switch Test
1. Unplug dryer or disconnect power.
2. Remove the wires from the switch to
complete this test.
3. Reference contact continuity with
Pins 1 and 2 to Pin 4 (White).
4. Reference contact continuity with Pin 3
to Pin 5.
Temperature Switch Table
SWITCH
POSITION
CONTACTS FUNCTION
3–5 2–4 1–4
12 o’clock O O O Air Fluff, No Heat
2 o’clock O O X Ex-Low
4 o’clock O X O Low
5 o’clock O X X Medium, Casual
7 o’clock X O O High
8 o’clock X O X Normal
10 o’clock X X O Medium, Energy
Saver
O = OPEN X = CLOSED
Wrinkle Prevent Switch (On/Off)
Test
1. Unplug dryer or disconnect power.
2. Remove the wires from the switch to
complete this test.
3. Reference contact continuity with Pin 1
to Pin 4 (White).
Wrinkle Prevent Switch Table
SWITCH
POSITION CONTACTS FUNCTION
11 o’clock Open Wrinkle Prevent
Off
1 o’clock Closed Wrinkle Prevent
On
End of Cycle Signal Switch Test
1. Unplug dryer or disconnect power.
2. Remove the wires from the switch to
complete this test.
3. Reference contact continuity with Pins 1
and 2 to Pin 4 (White).
End of Cycle Signal Switch Table
SWITCH
POSITION
CONTACTS FUNCTION
1–4 2–4
10 o’clock O O Off
12 o’clock X O Softer End of
Cycle Signal
2 o’clock O X Louder End of
Cycle Signal
O = OPEN X = CLOSED
High Limit Thermostat Test
1. Unplug dryer or disconnect power.
2. Remove the high limit thermostat and
check continuity. Refer to the Thermal
Components illustration above right.
➔If open, replace the high limit
thermostat.
➔If closed, apply heat. It should open at
about 250°F (121°C). Otherwise,
replace the high limit thermostat.
Thermal Cut-Off Test
This unit is equipped with a “one-shot”
thermal cut-off. See Thermal Components
illustration above. If the dryer does not heat
with power supplied:
1. Unplug dryer or disconnect power.
2. Check the thermal cut-off for continuity.
➔If open, thermal cut-off has failed and
must be replaced.
NOTE: If the thermal cut-off has failed,
replace the thermal cut-off and high limit
thermostat. In addition, check for failed
heater element, or blocked or improper
exhaust system.
Thermal Fuse Test
A thermal fuse is used on this model. The
thermal fuse is wired in series with the
dryerdrive motor. If thethermal fuse
opens, power is shut off to the motor.
1. Unplug dryer or disconnect power.
2. Check continuity of thermal fuse.
3. Once the thermal fuse has opened, it
must be replaced. Check for failed
thermistor, shorted heat element, or
other causes of failure. Replace failed
parts. See Thermal Components
illustration above.
123
Orange
FABRIC
Violet Tan
45
White
12
SIGNAL
4
White
Tan-White
White-Black
Thermal
Fuse
Thermistor
Thermal
Cut-Off
High Limit
Thermostat
Heat
Element
Thermal Components.
1
WRINKLE
GUARD
4
White
Gray

PAGE 6 TECH SHEET - DO NOT DISCARD
PART NO. W10112987A FOR SERVICE TECHNICIAN’S USE ONLY
Thermistor Test or Dryer Beeps
3 Times when Push to Start (PTS)
Pressed
An electronic temperature sensor called a
thermistor is used in this model in place of
an operating thermostat. The electronic
control monitors the exhaust temperature
using the thermistor, and cycles the heater
relay on and off to maintain the desired
temperature.
Procedure
Begin with a fully assembled, empty dryer
and a clean lint screen.
1. Set the following configuration:
■Door - must be closed
■Timer dial - Timed Drying
■Temperature switch - High
■Wrinkle Prevent switch - Off
■End of Cycle Signal switch - Louder
2. Press the Push to Start switch.
➔If you hear three short beeps and the
dryer shuts off after several seconds,
the thermistor or wire harness is either
shorted or open.
■Unplug dryer or disconnect power.
■Check wire connections at the
electronic control and thermistor.
PROBLEM POSSIBLE CAUSE / TEST
DRYER WILL NOT
RUN.
Refer to Motor Strip Circuit, page 3.
–SUPPLY CONNECTIONS
–HARNESS/CONNECTION
–MOTOR RELAY
–PUSH TO START (PTS) SWITCH
–THERMAL FUSE
–MOTOR
–DOOR SWITCH
–ELECTRONIC CONTROL
For more details, see Troubleshooting section, page 7.
DRYER WILL NOT
HEAT.
Refer to Heater Strip Circuit, page 3.
–SUPPLY CONNECTIONS
–HARNESS/CONNECTION
–HEATER RELAY
–THERMAL CUT-OFF
–THERMAL FUSE
–HIGH LIMIT THERMOSTAT
–HEATER
–CENTRIFUGAL SWITCH
–THERMISTOR
–ELECTRONIC CONTROL
For more details, see Troubleshooting section, page 7.
DRYER HEATS
DURING AIR
FLUFF (NO HEAT)
CYCLE.
Refer to Heater Strip Circuit, page 3.
–HARNESS/CONNECTION
–HEATER RELAY
–TEMPERATURE SWITCH
–ELECTRONIC CONTROL
For more details, see Troubleshooting section, page 7.
PROBLEM POSSIBLE CAUSE / TEST
DRYER WON’T
SHUT OFF.
Refer to Motor and Moisture Sensor Strip Circuits,
page 3.
–PUSH TO START (PTS) SWITCH
–HARNESS/CONNECTION
–MOTOR RELAY
–MOISTURE SENSOR
–ELECTRONIC CONTROL
For more details, see Troubleshooting section, page 7.
DRYER SHUTS
OFF BEFORE
CLOTHES
ARE DRY.
Refer to Thermistor Test, this page; and Moisture
Sensor Strip Circuit, page 3.
–HARNESS/CONNECTION
–MOISTURE SENSOR
–THERMISTOR
–ELECTRONIC CONTROL
–MAY NEED TO CHANGE TIMER SETTING TO A MORE DRY
SETTING
For more details, see Troubleshooting section, page 8.
TIMER
CONTINUOUSLY
ADVANCES.
Refer to Timer Drawing, page 2; and Motor Strip
Circuit, page 3.
–HARNESS/CONNECTION
–TIMER
For more details, see Troubleshooting section, page 8.
WRINKLE
PREVENT DOES
NOT RUN.
Refer to Wrinkle Prevent Switch (On/Off) Test, page 5.
■If wiring is functional, replace the
thermistor. Refer to Thermal
Components illustration, page 5.
➔If the dryer appears to operate
correctly, proceed to step 3.
3. Remove exhaust vent and start the dryer.
➔Turn Temperature switch to desired
temperature to be tested, and select
20 minutes of Timed Drying. Hold a
glass bulb thermometer capable of
readingfrom90°Fto180°F (32°C to
82°C) in the center of the exhaust
outlet. Measure exhaust temperatures
with heater off and on.
The correct exhaust temperatures
are as follows:
EXHAUST TEMPERATURES
TEMPERATURE
SWITCH
SETTING
HEAT TURNS
OFF*
°F (°C)
HEAT TURNS
ON
°F (°C)
High 155° ±10°
(68° ±6°)
10°–15° (6°–8°)
below the
heat turn off
temperature
Normal 145° ±10°
(63° ±6°)
Medium, Casual
Medium,
Energy Saver
135° ±10°
(57° ±6°)
Low 125° ±10°
(52° ±6°)
Ex-Low 115° ±10°
(46° ±6°)
*The measured overshoot using the glass
bulb thermometer in the exhaust outlet
can be 30°F (17°C) higher.
➔If the exhaust temperature is not
within specified limits:
■Unplug dryer or disconnect power.
■Disconnect wires from thermistor,
then check the resistance of the
thermistor. The following table
gives temperatures and ranges for
their associated resistance values:
THERMISTOR RESISTANCE
TEMP.
°F (°C)
RES.
kΩ
TEMP.
°F (°C)
RES.
kΩ
50° (10°) 19.0–22.0 80° (27°) 8.5–10.5
60° (16°) 14.8–16.8 90° (32°) 6.8–8.8
70° (21°) 11.5–13.5 100° (38°) 5.0–7.0
➔If the thermistor resistance does not
agree with table, replace the
thermistor.
➔If the thermistor resistance checks
agree with the measurements in the
table, replace the electronic control
assembly.
TROUBLESHOOTING GUIDE IMPORTANT: Electrostatic(static electricity) discharge may cause damage to
electronic control assemblies. See page 1 for details.

TECH SHEET - DO NOT DISCARD PAGE 7
FOR SERVICE TECHNICIAN’S USE ONLY PART NO. W10112987A
PROBLEM: Dryer Will Not Run
(Refer to Motor Strip Circuit, page 3; and
Troubleshooting Guide, page 6.)
1. Unplug dryer or disconnect power.
2. Check connector pins in P2 connector of
the electronic control to verify they are
making good connections.
3. Check the Push to Start (PTS) switch
continuity when pressed. It should show
continuity while pushed in. If not, replace
the PTS switch.
4. Perform Thermal Fuse Test, page 5.
5. Perform Door Switch Test, page 5.
6. If the motor started but did not continue
to run, and components checked in
steps 2 through 5 were OK, replace the
electronic control assembly.
7. If motor did not start and components
checked in steps 2 through 5 were OK,
replace the motor.
PROBLEM: Dryer Will Not Heat
(Refer to Heater Strip Circuit, page 3; and
Troubleshooting Guide, page 6.)
1. Perform Supply Connections Test,
page 4.
2. Perform Thermal Cut-Off Test, page 5.
3. Perform High Limit Thermostat Test,
page 5.
4. Unplug dryer or disconnect power.
5. Check continuity of heater:
➔Each element should be about 20 Ω
and should be open to ground,
chassis, and neutral.
➔If either element fails these tests in
step 5, replace the heat element
assembly.
6. Check continuity of motor centrifugal
switch:
➔1M to 2M terminals should be open in
the off condition. Manually operating
the switch should close 1M to 2M.
This can be done by pushing the
actuator from the off condition to the
run position. See the illustration
above right.
➔If these conditions are not true,
replace the motor.
PROBLEM: Dryer Heats During
Air Fluff (No Heat) Cycle
(Refer to Heater Strip Circuit, page 3; and
Troubleshooting Guide, page 6.)
1. Perform Temperature Switch Test, page 5.
2. Unplug dryer or disconnect power.
3. Check continuity of heater relay
contacts. COM to NO should be open.
If not, replace the heater relay.
4. With dryer fully assembled, plug in dryer
or reconnect power.
5. Set to Air Fluff.If the dryer still heats:
➔Unplug dryer or disconnect power.
➔Replace the electronic control
assembly.
Actuator in off condition.
Actuator in run position.
PROBLEM: Dryer Won’t Shut
Off
(Refer to Motor and Moisture Sensor Strip
Circuits, page 3; and Troubleshooting
Guide, page 6.)
1. With the dryer fully assembled, set the
timer to Off. If the dryer starts running as
soon as it is plugged in:
➔Unplug dryer or disconnect power.
➔Replace the timer.
2. Set the following configuration:
■Dryer - power cord plugged in
■Door - must be closed
■Temperature switch - High
■Timer - Timed Drying for less than
10 minutes
3. If the dryer starts running before the
Push to Start (PTS) switch is pressed:
➔Unplug dryer or disconnect power.
➔Replace the PTS switch.
➔If, after replacing the PTS switch, the
dryer still starts before the PTS switch
is pressed:
➔Unplug dryer or disconnect power.
➔Replace the motor relay.
4. If the dryer does not stop after the set
time elapses:
➔Unplug dryer or disconnect power.
➔Check the motor relay. Continuity of
relay should be open from COM to
NO.
5. If the dryer will not terminate its cycle
when set to Sensor Drying:
➔Unplug dryer or disconnect power.
➔Check the moisture sensor.
➔If there is continuity to Ground for
Yellow-Red (Y-R) wire with no load,
look for a short in the sensor or Y-R
wire. Verify harness connections both
at the sensor and the electronic
control.
➔If the sensor and Y-R wire are good,
replace the electronic control
assembly.
TROUBLESHOOTING IMPORTANT: Electrostatic(static electricity) discharge may cause damage to
electronic control assemblies. See page 1 for details.

PAGE 8 TECH SHEET - DO NOT DISCARD
PART NO. W10112987A FOR SERVICE TECHNICIAN’S USE ONLY 12/06
PROBLEM: Dryer Shuts Off
Before Clothes Are Dry
(Refer to Moisture Sensor Strip Circuit,
page 3; Thermistor Test, page 6; and
Troubleshooting Guide, page 6.)
1. Test the moisture sensor by following the
procedure outlined in the Diagnostic
Test, page 1. If the moisture sensor fails
the Diagnostic Test (does not produce a
beep sound):
➔Unplug dryer or disconnect power.
➔Check the moisture sensor.
➔If there is continuity to Ground for
Yellow-Red (Y-R) wire with no load,
look for a short in the Sensor or Y-R
wire. Verify harness connections both
at the sensor and the electronic
control.
➔If the sensor and Y-R wire are good,
replace the electronic control
assembly.
2. If Diagnostic Test is passed, verify
thermistor by performing test procedures
outlined in Thermistor Test, page 6.
3. If problem persists after replacing
moisture sensor and thermistor:
➔Unplug dryer or disconnect power.
➔Replace the electronic control
assembly.
PROBLEM: Timer Continuously
Advances
(Refer to Timer Drawing, page 2; Motor
Strip Circuit, page 3; and Troubleshooting
Guide, page 6.)
1. Unplug dryer or disconnect power.
2. Verify the Blue wire and the Black L1
wires are in the correct positions. See
timer illustration on page 2.
3. Test the timer by following the procedure
outlined in the Diagnostic Test, page 1.
4. If the timer continues to advance past
Off, replace the timer.
MANUFACTURED UNDER ONE OR MORE
OF THE FOLLOWING U.S. PATENTS:
4,669,200
4,700,495
4,754,556
4,840,285
4,865,366
4,899,464
4,908,959
4,989,347
5,066,050
5,560,120
5,809,828
6,020,698
6,047,486
6,199,300
6,446,357
6,597,144
6,604,298
6,685,241
6,732,447
6,784,673
6,819,255
D,314,261
D,314,262
D,457,991
D,457,992
D,495,453
TROUBLESHOOTING (cont.) IMPORTANT: Electrostatic(static electricity) discharge may cause damage to
electronic control assemblies. See page 1 for details.