Kenmore 796.8002.900 User manual

ELECTRIC & GAS DRYER
SERVICE MANUAL
CAUTION
READ THIS MANUAL CAREFULLY TO DIAGNOSE
TROUBLES CORRECTLY BEFORE OFFERING SERVICE.
MODEL : 796.8002*.900 / 796.8027*.900 / 796.8031*.900 /
796.9002*.900 / 796.9027*.900 / 796.9031*.900
Website:http://www.sears.com

AUG. 2009 PRINTED IN KOREA P/No.:MFL62119905

2
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.
!
WARNING !
WHAT TO DO IF YOU SMELL GAS:
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.
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.
IMPORTANT
Electrostatic Discharge (ESD)
Sensitive Electronics
ESD problems are present everywhere. ESD may damage or weaken the electronic
control assembly. The new control assembly 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 control assembly by edges only.
■When repackaging failed electronic control assembly in anti-static bag, observe above instructions.
■Do not try to light a match, or cigarette, or turn on
any gas or electrical appliance.
■Do not touch any electrical switches. Do not use any
phone in your building.
■Clear the room, building or area of all occupants.
■Immediately call your gas supplier from a neighbor’s
phone. Follow the gas supplier’s instructions
carefully.
■If you cannot reach your gas supplier, call the fire
department.

3
CONTENTS
1. SPECIFICATIONS .................................................................................................................4
2. FEATURES AND BENEFITS ................................................................................................... 5
3. INSTALLATION INSTRUCTIONS ........................................................................................... 6
4. COLUMBUS DRYER CYCLE PROCESS ................................................................................... 9
5. COMPONENT TESTING INFORMATION ..............................................................................10
6. MOTOR DIAGRAM AND SCHEMATIC..................................................................................13
7. CONTROL LAY - OUT .........................................................................................................14
8. WIRING DIAGRAM ............................................................................................................15
9. DIAGNOSTIC TEST .............................................................................................................16
9-1. TEST 1 120VAC ELECTRICAL SUPPLY..........................................................................17
9-2. TEST 2 THERMISTOR TEST --- MEASURE WITH POWER OFF .......................................20
9-3. TEST 3 MOTOR TEST ................................................................................................21
9-4. TEST 4 MOISTURE SENSOR .....................................................................................22
9-5. TEST 5 DOOR SWITCH TEST ....................................................................................23
9-6. TEST 6 HEATER SWITCH TEST - ELECTRIC TYPE...........................................................24
9-7. TEST 7 GAS VALVE TEST - GAS TYPE.........................................................................25
10. CHANGE GAS SETTING (NATURAL GAS, PROPANE GAS) ...............................................26
11. DISASSEMBLY INSTRUCTIONS ..........................................................................................28
12. EXPLODED VIEW..............................................................................................................35
12-1. CONTROL PANEL & PLATE ASSEMBLY.......................................................................35
12-2. CABINET & DOOR ASSEMBLY...................................................................................36
12-3-1. DRUM & MOTOR ASSEMBLY : ELECTRIC TYPE ........................................................37
12-3-2. DRUM & MOTOR ASSEMBLY : GAS TYPE ...............................................................38

1SPECIFICATIONS
4
ITEM
796.8002*.900 / 796.8027*.900 / 796.8031*.900 /
796.9002*.900 / 796.9027*.900 / 796.9031*.900
REMARK
White / Patina Beige
Spray
Color
Top Plate
Door Trim
ELECTRICITY
CONSUMPTION
MOTOR
HEATER
LAMP
GAS VALVE
CONTROL TYPE
DRUM CAPACITY
Weight (lbs): Net/Gross
No. of Programs
No. of Dry Option
No. of Temperature Controls
No. of Dry Levels
Audible End of Cycle Beeper
Moisture
Temperature
Reversible Door
Drum
Dryer Rack
Child lock
Interior Light
Product (WXHXD)
Packing (WXHXD)
Sensor
POWER SUPPLY
Material &
Finish
Light Gray
120V / 240V 60Hz (26A)
250W (4.5A)
5400W (22.5A)
15W (125mA)
13W (110mA) X 2
Electronic
7.1 cu.ft.
126 / 144
9
5
5
5
High / Low / Off
Equipped
Equipped
Adopted
Double Coated Steel
Equipped
Equipped
Equipped
27" x 38" x 28 1/3"
29 1/2" x 44 3/4" x 30 3/4"
AC 120V
AC 240V ( ELECTRIC TYPE)
AC 120V
AC 120V ( GAS TYPE)
Electro sensor
Thermistor

2FEATURES AND BENEFITS
5
Apply Model : 796.8002*.900 / 796.8027*.900 / 796.8031*.900
Apply Model : 796.9002*.900 / 796.9027*.900 / 796.9031*.900

6
3-1. POWER CORD
INSTALLATION INSTRUCTIONS
3
1) 4-wire connection
1. External ground connector - Dotted line shows
position of NEUTRAL ground wire before being
moved to center terminal block screw
2. Center silver-colored terminal block screw
3. Green wire of harness
1. External ground connector
2. Green or bare copper wire of power supply cord
3. 3/4 in. (1.9 cm) UL-listed strain relief
4. Center silver-colored terminal block screw
5. Neutral grounding wire (green)
6. Neutral wire (white)
5. Connect the other wires to outer terminal block
screws. Tighten screws.
6. Tighten strain relief screws.
7. Insert tab of terminal block cover into slot of dryer
rear panel Secure cover with hold-down screw.
3. Connect ground wire (green or bare) of power
supply cable to external ground conductor screw.
Tighten screw.
4. Connect neutral wire (white or center wire) of
power supply cord to the center, silver colored
terminal screw of the terminal block.
1. 4-wire receptacle (NEMA type 14-30R)
2. 4-prong plug
3. Ground prong
4. Neutral prong
5. Spade terminals with upturned ends
6. 3/4 in. (1.9 cm) UL approved strain relief
7. Ring terminals
1. Remove center terminal block screw.
2. Remove appliance ground wire (green) from
external ground connector screw. Fasten it under
center, silver colored terminal block screw.
IMPORTANT: A 4-wire connection is
required for mobile
homes and where local
codes do not permit the
use of 3 wire connections.
12
3 4 5 7
6
6
5
3
2
14
3
12

7
2) 3-wire connection
Use where local codes permit connecting
cabinet-ground conductor to neutral wire.
1. Remove center terminal block screw.
2. Remove appliance ground wire (green) from
external ground connector screw. Connect
appliance ground wire and the neutral wire (white
or center wire) of power supply cord/cable under
center, silver colored terminal block screw.
Tighten screw.
3. Connect the other wires to outer terminal block
screws. Tighten screws.
Use where local codes permit connecting
cabinet-ground conductor to neutral wire.
3) Optional 3-wire connection
1. Loosen or remove center terminal block screw.
2.
Connect neutral wire (white or center wire) of
power supply cord to the center, silver colored
terminal screw of the terminal block. Tighten screw.
1. External ground connector
2. Neutral grounding wire (green)
3. Center silver-colored terminal block screw
4. Neutral wire (white or center wire)
5. 3/4 in. (1.9 cm) UL-listed strain relief
3. Connect the other wires to outer terminal block
screws. Tighten screws.
4. Tighten strain relief screws.
5. Insert tab of terminal block cover into slot of dryer
rear panel. Secure cover with hold-down screw.
4. Tighten strain relief screws.
5. Insert tab of terminal block cover into slot of dryer
rear panel. Secure cover with hold-down screw.
6. Connect a separate copper ground wire from the
external ground connector screw to an adequate
ground.
1. External ground connector
2. Neutral grounding wire (green)
3. Neutral wire (white or center wire)
4. Grounding path determined by a qualified electrician
1. 3-wire receptacle (NEMA type 10-30R)
2. 3-wire plug
3. Neutral prong
4. Spade terminals with up turned ends
5. 3/4 in. (1.9 cm) UL approved strain relief
6. Ring terminals
7. Neutral (white or center wire)
3
12
4
4
2
5
13
4
76
5
2
3
1

8
3-2. Connect Gas Supply Pipe (Gas Dryer ONLY)
2
3
5
1
4
1. Make certain your dryer is equipped for use with the
type of gas in your laundry room. Dryer is equipped
at the factory for Natural Gas with a 3/8” N.P.T. gas
connection.
2. Remove the shipping cap from the gas connection
at the rear of the dryer. Make sure you do not
damage the pipe thread when removing the cap.
3. Connect to gas supply pipe using a new flexible
stainless steel connector.
4. Tighten all connections securely. Turn on gas and
check all pipe connections (internal & external) for
gas leaks with a non-corrosive leak detection fluid.
5. For L.P. (Liquefied Petroleum) gas connection, refer
to section on Gas Requirements.
For further assistance, refer to section on Gas Requirements.
1 New Stainless Steel Flexible Connector - Use
only if allowed by local codes (Use Design
A.G.A. Certified Connector)
2 1/8” N.P.T. Pipe Plug
(for checking inlet gas pressure)
3 Equipment Shut-Off Valve-Installed within 6’
(1.8 m) of dryer
4 Black Iron Pipe
Shorter than 20’ (6.1 m) - Use 3/8” pipe
Longer than 20’ (6.1 m) - Use 1/2” pipe
5 3/8” N.P.T. Gas Connection

4DRYER CYCLE PROCESS
9
* Sensor dry : “Dry Level” is set by users.
** Manual dry : “Temperature control” is set by users.
Default settings can be adjusted by users.
Apply Model : 796.8002*.900 / 796.8027*.900 / 796.8031*.900
796.9002*.900 / 796.9027*.900 / 796.9031*.900

10
When checking the Component, be sure to turn the power off, and do voltage discharge sufficiently.
COMPONENT TESTING INFORMATION
5
!
CAUTION
Component Test Procedure Check result Remark
1. Thermal cut off
• Check Top Marking :
N130
Measure resistance of terminal
to terminal
①Open at 284 ±12°F
(140 ±7°C)
②Auto reset -31°F (-35°C)
Same shape as Outlet Thermostat.
If thermal fuse is open must
be replaced
①Resistance value ≒∞
②Continuity (250°F ↓) < 1Ω
• Heater case-
Safety
• Electric type
2. Hi limit Thermostat
(Auto reset) Measure resistance of terminal to terminal
①Open at 257 ±9°F
(125 ±5°C)
②Close at 221 ±9°F
(105 ±5°C)
①Resistance value ≒∞
②Resistance value < 5Ω
• Heater case -
Hi limit
• Electric type
3. Outlet Thermostat
( Auto reset)
• Check Top Marking :
N85
Measure resistance of terminal
to terminal
①Open at 185 ±9°F
(85 ±5°C)
②Close at 149 ±9°F
(65 ±5°C)
Same shape as Thermal cut off.
①Resistance value ≒∞
②Resistance value < 5Ω
• Blow housing -
Safety
• Electric type
4. Lamp holder Measure resistance of terminal
to terminal Resistance value : 80Ω~ 100Ω
6. Idler switch Measure resistance of the
following terminal :
“COM - NC”
1. lever open
①Resistance value < 1Ω
2. Lever push (close)
②
Resistance value ≒∞
5. Door switch Measure resistance of the
following terminal
1) Door switch knob : open
①Terminal : “COM” - “NC” (1-3)
②Terminal : “COM” - “NO” (1-2)
2) Door switch push : push
①Terminal : “COM” - “NC” (1-3)
②Terminal : “COM” - “NO” (1-2)
①Resistance value < 1Ω
②Resistance value ≒∞
①Resistance value ≒∞
②Resistance value < 1Ω
The state that
Knob is
pressed is
opposite to
Open
condition.

11
Component Test Procedure Check result Remark
7. Heater Measure resistance of the
following terminal
①Terminal : 1 (COM) - 2
②Terminal : 1 (COM) - 3
③Terminal : 2 - 3
①Resistance value : 10Ω
②Resistance value : 10Ω
③Resistance value : 20Ω
• Electric type
8. Thermistor Measure resistance of terminal
to terminal
Temperature condition :
58°F ~ (10~40°C)
58°F ~ 104F (10~40°C)
Resistance value : 10Ω• Heater case -
Hi limit
• Electric type
9. Motor • See Page 13
10. Gas valve valve 1
valve 2
Measure resistance of the
following terminal
①Valve 1 terminal
②Valve 2 terminal
①
Resistance value : > 1.5kg ~
②
Resistance value :
> 1.5~2.5kg
• Gas type
11. Igniter Measure resistance of terminal
to terminal Resistance value : 100~800Ω• Gas type
12. Frame Detect Measure resistance of terminal
to terminal
①Open at 370°F ((Maximum)
②Close at 320°F
①Resistance value ≒∞
②Resistance value < 1Ω
• Gas type
①
②③

12
Component Test Procedure Check result Remark
13. Hi-limit Thermostat
(Auto reset)
• Check Top Marking :
N95
Measure resistance of terminal
to terminal
①Open at 203 ±7°F (95 ±5°C)
②Close at 158 ±9°F (70 ±5°C)
①Resistance value ≒∞
②Continuity < 1Ω
• Gas type
• Gas funnel-
Hi-limit
13. Thermal Cut off
(Manual reset)
• Check Top Marking :
N110
Measure resistance of terminal
to terminal
①Open at 230 ±12°F
(110 ±7°C)
②Manual reset
If thermal fuse is open must
be replaced
①Resistance value ≒∞
②Continuity < 1Ω
• Gas type
• Gas funnel-
Safety

13
MOTOR DIAGRAM AND SCHEMATIC
6
󰃱Contact On / Off by Centrifugal Switch
󰃱STOP MODE
(When Motor does not operate) 󰃱RUN MODE (Motor operates)
When checking Component, be sure to turn Power off, then do voltage discharge sufficiently.
NOTE
Centrifugal switch Centrifugal switch
(Pull Drive forward)

7CONROL LAY - OUT
14
PWB ASSEMBLY DISPLAY LAY-OUT
PWB ASSEMBLY LAY-OUT

8WIRING DIAGRAM
15
ELECTRIC DRYER WIRING DIAGRAM
GAS DRYER WIRING DIAGRAM
A
Apply Model : 796.8002*.900 / 796.8027*.900 / 796.8031*.900
Apply Model : 796.9002*.900 / 796.9027*.900 / 796.9031*.900
Label all wires prior to disconnection when servicing controls. Wiring
errors can cause improper and dangrous operation. Verify proper
operation after servicing.
!

9DIAGNOSTIC TEST
16
1. This TEST should be used for Factory test /Service test. Do not use this DIAGNOSTIC TEST other than specified.
2. Activating the Heater manually with the Door open may trip the Thermostat attached to the Heater, therefore do not activate it
manually. (Do not press the door switch to operate the heater while the door is open )
ACTIVATING THE DIAGNOSTIC TEST MODE
1. Unit must be in Standby (unit plugged in, display off)
2. Press POWER while pressing MORE TIME, and LESS TIME simultaneously.
Pressing the
START/PAUSE
button
CHECKING
ACTION DISPLAY CHECKING POINT REMARK
None
LQC TEST
LQC TEST Thermistor open See test 2
See test 3
See test 4
See test 8
Auto Off
See test 6
Gas valve
See test 7
LQC TEST Thermistor close
Motor runs
Displays Moisture Sensor Operation:
If moisture sensor is contacted with
damp cloth. The display number is
below 180, in normal condition.
Won’t power up
Detective LED or LCD
See test 1
Display: See page
Once
Twice
3 times
4 times
5 times
During check,
If the door is open.
During check,
If the door is closed.
Electric control
&
Temperature
sensor
Motor 70 ~ 255
Measured
Moisture Value.
Current Temp.
70 ~ 255
50~255 Measured
“SE”(Error Display)
“dE” or “Error”
(THE DOOR IS OPEN.PLEASE
CLOSE THE DOOR
COMPLETELY)
Current Temp.
(5 ~ 70)
ELECTRIC TYPE
Motor + Heater 1 (2700W)
GAS TYPE
Motor + Valve
Motor, Heater
Control Off
Door switch
Lamp
• Press Start button 1 time and then open the
door. Proceed again with the step 1 (by pressing
start 1 time), step 2 (by pressing start 2 times),
step 3 (by pressing start 3 times) and step 4 (by
pressing start 4 times) in sequence.
•Press Start 2 times and then open the door. Proceed
again from the step 1 all the way to the step 4.
•Press Start 3 times and then open the door
Proceed with the step 1 and skip the step 2 and
press step 3 twice and finish with step 4 by making
sure the all the electric devices shut off in the end.
Motor, Heater Off
Semi-conductor
Motor & Heater Off + Lamp On +
Buzzer beeps seven times
Motor on & Heater
Off + Lamp Off
ELECTRIC TYPE: Heater runs
GAS TYPE: GAS Valve runs
(Display the Temperature of
Inside drum.)
ELECTRIC TYPE
Motor + Heater 1
+Heater 2 (5400W)
GAS TYPE
Motor + Valve

17
With the dryer plugged in, press the
POWER button to turn on dryer.
Replace the power cord.
Check the voltage at the main PCB
between WH1-1 (WH) and the black
wire on the black tab relay. Is 120
VAC present while pressing the start
button?
(NOTE: For gas dryers skip this step.)
With the dryer plugged in, check the
voltage at the terminal block between
the neutral (WH) and L1 (BK)
terminals. Is the voltage 120 VAC
while pressing the START/PAUSE
button?
With the dryer plugged in, check the
voltage at the power cord plug
between the neutral and L1 (and L2
for electric dryers). Is the voltage 120
VAC while pressing the
START/PAUSE button?
•Replace
main PCB.
•Replace
display
PCB.
•Check
power cord.
•Check
terminal
block
connection
s.
•Check the
power
supply fuse
or circuit
breaker.
•Check the
receptacle
connections.
YES
YES
NO
NO
NO
YES
YES
NOTE: To properly check power supply in case of floating neutral or high
resistance connections, a load must be applied to the circuit. It is
important that the power button be pressed while checking the voltages as
described below.
Test 1 120V AC Electrical supply

18
Caution
Trouble Symptom
2. Status Mode Of The Connection
1.Power Connection
Measurement Condition
When measuring power, be sure to wear insulated gloves, to and avoid an
electric shock.
Check the Tab Relays Connection properly.
With Dryer Power On; Connector linked to Controller.
Ta
Ta
Trans
Tab Relay 1 Tab Relay 2
BR
High
Mid High
Medium
High
Mid High
Medium
Temperature Control below 68±4°C.
Turn on Heater1 and Heater2.
Temperature Control below 70±4°C.
Turn on Burner
Temperature Control below 47±4°C.
Turn on Burner
Temperature Control below 52±4°C.
Only Turn on Heater1.
on
on
OO
O
O
onoff off
on on on
Low
Extra Low
❈ PCB ASSEMBLY LAYOUT Low
Extra Low
Ta R
Connector Housing
Black Check the Matching color Between
Harness wire and Tab Relay.
(Black Housing –Black Tab Relay)
Check the Matching color Between
Harness wire and Tab Relay.
(White Housing –White Tab Relay)
White
Color
< Table1 > : Connection of the Tab Relay with Heater (Elec)
< Table 2 > : Connection of the Tab Relay with Burner (Gas)
< Table1 > : Connection of Tab Relay with the Tab Relay of the PCB ASSEMBLY (Elec)
Harness
Connection Remark
PCB
1
2
Yellow Wire
Black Wire
Connector Housing Tap relay 1
Tap relay 2
1
2
Blue Wire
Black Wire
Connector Housing

19
3. Status Mode Of wrong Connection
1.Black and White Housing
2.Black Housing
3.White Housing
❇4.Black and White Housing
5.Black and White Housing
Off
Off
Normal
Heater2
Off
Off
Off
Normal
Heater1
Off
Power Off
Power Off
Power On
Power On
Power Off
Wire ①, ②CROSS
Wire ①, ②CROSS
Wire ①, ②CROSS
Housing CROSS
Housing and Wire ①, ②
CROSS
Items Case Heater1
Operation(black) Heater2 operation(White) PCB condition Of operation
1.Black and White Housing Off Off Power Off
Wire ①, ②CROSS
Items Case Heater1
Operation(black) Heater2 operation(White) PCB condition Of operation
- In case of power failure(<Table1>-1,2,5,<Table2>-1), Please check the Connection of “2.Status Table of Connection”.
In case of power failure(<Table1>-4), please check the Connection of “2. Status Table of Connection”. Because improper
Connection of the equipment-dryer can be damaged of changing heater.
!
CAUTION
Connector Housing Black
Check the Matching color Between
Harness wire and Tab Relay.
(Black Housing –Black Tab Relay)
Color
< Table 2 > : Connection of Tab Relay with PCB ASSEMBLY (Gas)
< Table1 > : Wrong Connection of the Tab Relay and Connector Housing (Elec)
< Table2 > : Wrong Connection of the Tab Relay and Connector Housing (Gas)
Harness Remark
PCB
Tap relay 1
1
2
Blue Wire
Black Wire
Connector Housing