ZB20734_3980060.vp Kenmore Whirlpool Dryer Tech Sheet 110.82832100

2013-04-09

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TECH SHEET - DO NOT DISCARD

PAGE 1

IMPORTANT
Electrostatic Discharge (ESD) Sensitive Electronics

Electrical Shock Hazard

ESD problems are present everywhere. ESD may damage or weaken the machine
control electronics. 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.

Disconnect power before servicing.
Replace all parts and panels before
operating.

■ Use an anti-static wrist strap. Connect wrist strap to green ground

Failure to do so can result in death
or electrical shock.

connection point or unpainted metal in the appliance
-ORTouch your finger repeatedly to a green ground connection point or
unpainted metal in the appliance.

DIAGNOSTIC GUIDE

■ Before removing the part from its package, touch the anti-static bag to a

green ground connection point or unpainted metal in the appliance.

Before servicing, check the following:

■ Avoid touching electronic parts or terminal contacts; handle machine control

■ Is the power cord firmly plugged into a

electronics by edges only.

live circuit with proper voltage?

■ When repackaging failed machine control electronics in anti-static bag,

■ Has a household fuse blown or circuit

observe above instructions.

breaker tripped? Time delay fuse?
■ Is dryer vent properly installed and

clear of lint or obstructions?
■ All tests/checks should be made with a

VOM or DVM having a sensitivity of
20,000 ohms per 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.

If unsuccessful entry into diagnostic
mode, actions can be taken for
specific indications:
Indication 1: None of the indicators or
display turns on.
Action: Select any Manual Cycle.
If indicators come on, then try to change
the dryer time by pressing the More Time
and Less Time buttons. If either button
fails to change the time, something is
faulty with one of those buttons, and it is
not possible to enter the diagnostic mode.
Remove the console electronics and
housing. See Accessing & Removing the
Electronic Assemblies, page 10.

■ The most common cause for control

failure is corrosion on connectors.
Therefore, disconnecting and
reconnecting wires will be necessary
throughout test procedures.
■ 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.

If no indicators come on after pressing
the Manual Cycle buttons, go to
TEST #1 (Supply Connections), page 4.

■ Resistance checks must be made with

power cord unplugged from outlet.

DIAGNOSTIC TESTS
These tests allow factory or service
personnel to test and verify all inputs to the
machine control electronics. One may want
to do a quick and overall checkup of the
dryer with these tests before going to
specific troubleshooting tests.

Indication 2: E1 or E2 flashes from
the display.
Action: Proceed to TEST #3a (Thermistor
Test), page 6.

Indication 3: E3 flashes from the
display.
Action: Check that the correct machine
control electronics and Console
Electronics and Housing are installed.
Do so by removing these components to
view the part numbers and compare

ACTIVATING THE DIAGNOSTIC
TEST MODE
1. Be sure the dryer is in Standby Mode
(plugged in and all indicators off).
2. Press the following button sequence:
MORE TIME ➔ LESS TIME ➔
MORE TIME ➔ LESS TIME
- all within 5 seconds.

them to the part numbers in the
Components Table on page 2. See
Accessing & Removing the Electronic
Assemblies, page 10. Replace
components if necessary.

Diagnostic: Console switches and
indicators
Pressing each button should cause a beep
tone and control one or more LEDs as
shown in figure 1, Console Diagnostics,
page 2. Pressing the Start button will also
control the motor and heater, while the
two-digit display will indicate “01”.

Diagnostic: Moisture Sensor
Locate two metal strips on the face of the
lint screen housing. Bridge these strips with
a wet cloth or a finger. If a beep is heard
and “03” is displayed on the console, the
sensor is OK. If not, or if a beep tone is
heard before bridging the moisture strips,
go to TEST #4, step 2, page 7.

Diagnostic: Door Switch
Opening the door should cause a beep tone
and a number and letter to be indicated in
the two-digit display. Closing the door firmly
should cause a beep tone and the display to
go blank or indicate “88”.

DISPLAY FAULT/ERROR CODES
The error codes below would be indicated when attempting to start a drying cycle, or after
activating the Diagnostic Test Mode.

3. All indicators on the console are
illuminated with “88” showing in the
“ESTIMATED TIME REMAINING”
(two-digit) display, if this test mode
has been entered successfully.

DISPLAY

DESCRIPTION

POWER FAILURE

THERMISTOR OPEN

FOR SERVICE TECHNICIAN'S USE ONLY

EXPLANATION AND RECOMMENDED PROCEDURE

“PF” flashes to indicate that a power failure occurred while the dryer
was running. Press START to continue the cycle, or press
PAUSE/CANCEL to clear the display.
“E1” flashes if the thermistor is open. See TEST #3a, page 6.

THERMISTOR SHORTED “E2” flashes if the thermistor has shorted. See TEST #3a, page 6.

PART NO. 3980060

PAGE 2

TECH SHEET - DO NOT DISCARD

Each cycle select
button controls
only its own LED

This button controls
the left digit
This button controls
the right digit

Start button
controls
Status LEDs

Start button
turns on Dryer
(and controls
Status LEDs)

Button
controls
all LEDs
above button

Turns off all LEDs
and exits
diagnostic mode

Each button
controls only
its own LED

Figure 1. Console Diagnostics

PART NUMBER
COMPONENT
Console Electronics and Housing
for White/Graphite Models:

82822
84832
92822
94832

Electric
Dryers

Gas
Dryers

8529879
85298791
—
—

—
—
8529879
85298791

for Bisque/Graphite Models: 82824
84834
92824
94834

8529880
85298801
—
—

—
—
8529880
85298801

for Graphite/Black Models:

8529881
85298811
—
—

—
—
8529881
85298811

Machine Control Electronics

3980062

Main Wire Harness

8299926

8299927

Digital Wire Harness

8299925

8299929

Wire Harness, Moisture Sensor

3406653

—

3401850

Wire Harness, Gas Valve

82826
84836
92826
94836

Door Switch

8519323

Wire and Door Switch Assembly

8283288

Belt Switch

3394881

Thermal Cut-Off

8318314

—

Thermal Fuse

3390719

Heat Element Assembly

8527865

—

8318276

Gas Burner Assembly
High Limit Thermostat

3391914

3403140

Drive Motor

3395654

Thermistor - NTC 10k Ohms

3976615

Add Model Selector p/n 8519455. Insert Model Selector into rear
of the console electronics.

Button
controls
all LEDs
above button

Drum Size:

Drum Speed:

7.0 cubic feet

51.5 ± 3 RPM CW

ELECTRIC DRYER

Button
controls
all LEDs
above button

GAS DRYER

Contacts
Function

Contacts

1M 2M 3M 5M 6M

Function

Start

Run

= Contacts closed

Centrifugal Switch (Motor)

Blue

White

Centrifugal Switch (Motor)

Green/
Yellow

Red

3M 5M 6M

Black

Blue

White

Green/
Yellow

Red

Pluggable Drive
Motor Switch

BLACK
WHITE
BLUE
WHITE
WHITE

BLUE

Gas Valve

PART NO. 3980060

FOR SERVICE TECHNICIAN'S USE ONLY

TECH SHEET - DO NOT DISCARD

PAGE 3

ELECTRIC DRYER WIRING DIAGRAM

IMPORTANT: Electrostatic (static electricity)
discharge may cause damage to machine
control electronics. See page 1 for details.

RED - LINE L2

L1 LINE - BLACK
240 VOLTS
WHITE - NEUTRAL

120 VOLTS

NEUTRAL
TERMINAL
LINKED TO
CABINET

BROWN

BLACK

NC
COM

DRUM LAMP
BK

P1-5

DOOR
L1
NEUTRAL
P3

USER INTERFACE

MOTOR

(ACTIVE OVERLAY or
ALTERNATE TECHNOLOGY)

P1-1

BLUE

GRN/YEL

MOIST RTN
HEATER
RELAY
N.O. HEATER +V

MODEL
MODEL RTN

(0.250 TERMINAL)

COM
(0.250 TERMINAL)

HEATER RTN

TEMP.
TEMP RTN
N.C.

WHITE

P2-1
YEL/RED
G

BELT
SWITCH

P2-4
P2-5 RED/WHT

THERMISTOR

P2-6 BLK

10k

DRIVE MOTOR
1/3 H.P.

SENSOR
MOVS

P2-3

CENTRIFUGAL SWITCH

MAIN
2.4 - 3.6
START
2.4 - 3.8

SENSOR
P2-2 BLK

WHITE

BLUE
THERMAL FUSE
196° F (91° C)

P4
MOIST.

WHITE

DOOR
NO SWITCH

WHITE

P1-2 NEUTRAL
P1-4

BLUE

P1-3

± 3%

P2-7

ELECTRONIC
CONTROL

NC
RED

RED/WHITE

BLACK

RED

HIGH LIMIT
THERMOSTAT
250° F (121° C)

THERMAL CUT-OFF
(TCO) 352° F (178° C)

HEATER
7.8-11.8

GAS DRYER WIRING DIAGRAM
L1 LINE - BLACK

WHITE - NEUTRAL N
120 VOLTS

DRUM LAMP
BROWN

BLACK

NC
COM

P1-5

DOOR
L1
NEUTRAL
P3

USER INTERFACE

MOTOR

(ACTIVE OVERLAY or
ALTERNATE TECHNOLOGY)

P1-1
P4
MOIST.

MOIST RTN

N.O.
(0.250 TERMINAL)

COM
(0.250 TERMINAL)

HEATER
RELAY

MODEL
MODEL RTN

HEATER +V
HEATER RTN

TEMP.

P1-2 NEUTRAL

P2-7

5M
4M

SENSOR
MOVS

BELT
SWITCH

BLK

P2-5 RED/WHT

N.C.

DOOR
NO SWITCH

WHITE

P2-1
YEL/RED
SENSOR
P2-2
BLK
P2-3
P2-4

WHITE

BLUE

GRN/YEL

TEMP RTN

BLK

THERMISTOR
10k

CENTRIFUGAL
SWITCH

MAIN
2.4 - 3.6
START
2.4 - 3.8
3M
DRIVE MOTOR

± 3%

6M
BLK

VALVE
MOV

NC
TF1

TF2

THERMAL FUSE
196°F (91°C)

ASSIST
4

BLUE

HS1

HIGH LIMIT HS2
THERMOSTAT
205°F (96°C)

5
MAIN

RED

IGR

IGNITOR

50-500
HOLD

RED

FOR SERVICE TECHNICIAN'S USE ONLY

BLUE

WHITE

P1-4

P2-6

ELECTRONIC
CONTROL

BLUE

P1-3

FS1

FS2

22,000 BTU/HR

VALVE
NO. 1
VALVE
NO. 2
FLAME
SENSOR

PART NO. 3980060

PAGE 4

TECH SHEET - DO NOT DISCARD
GAS DRYER

TROUBLESHOOTING GUIDE

1. After removing the cover plate, check
that the power cord is firmly connected to
the dryer's wire harness. See figure 4.

Some tests will require accessing components. See figure 14, page 9, for component locations.
PROBLEM

POSSIBLE CAUSE / TEST

NOTE: Possible Cause/Tests MUST be performed in the sequence shown for each problem.
Wire
Harness

WON’T POWER UP.
(No response when buttons are pressed.)

1. Supply connections. See TEST #1 below.
2. Check harness connections.
3. Control electronics and housing. See TEST #5, page 8.

WON’T START CYCLE WHEN START
BUTTON IS PRESSED.

1. If number display flashes, check to be sure the door is completely shut, and press and hold down START for about 1 second.
2. See TEST #2, page 5.
3. See TEST #6, page 9.

WON’T SHUT OFF WHEN EXPECTED.

1. Check PAUSE/CANCEL button. See TEST #5, page 8.
2. Control Electronics and housing. See TEST #5, page 8.
3. Moisture Sensor. See TEST #4, page 7.

CONTROL WON’T ACCEPT SELECTIONS.

Control electronics and housing. See TEST #5, page 8.

WON’T HEAT.

1. Heater. See TEST #3, page 5.
2. Check harness connections.
3. Check installation.

HEATS IN AIR CYCLE.

Thermistor. See TEST #3a, page 6.

Power Cord

Figure 4. Power cord-to-wire harness
connection for gas dryer.

SHUTS OFF BEFORE CLOTHES ARE DRY. Moisture Sensor. See TEST #4, page 7.

TROUBLESHOOTING TESTS
NOTE: These checks are done with the
dryer disconnected from power.

Power Cord
Plug

2. Access the machine control electronics
without disconnecting any wiring to the
control board. See page 10, figure 17.

Terminal Block

3. With an ohmmeter, check for continuity
between the neutral (N) terminal of the
plug and P1-2 (white wire) on the machine control board. The left-hand side of
figure 5 shows the position of the neutral
terminal (N) on the power cord's plug.

TEST #1
Supply Connections

COM

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 (electric dryer)
or wire harness connection (gas dryer).
Remove the cover plate from the top right
corner of the back of the dryer, before doing
the checks. See figure 2.

Remove
Screw

Terminal
Block Cover

Figure 2. Remove the cover plate.
ELECTRIC DRYER
1. With an ohmmeter, check for continuity
between the neutral (N) terminal of the
plug and the center contact on the
terminal block. See figure 3.
➔ If there is no continuity, replace the
power cord and test the dryer.
➔ If there is continuity, go to step 2.
2. 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 figure 3.

PART NO. 3980060

➔ If there is continuity, go to step 4.
Figure 3. Plug-to-terminal connections
for electric dryer.
➔ When this is found, go to step 3.
➔ 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.

➔ If there is no continuity, disconnect
the white wire of the harness from the
power cord at the location illustrated
in figure 4. Test the continuity of the
power cord's neutral wire as
illustrated in Figure 5. If an open
circuit is found, replace the power
cord. Otherwise, go to step 4.
Power Cord
Plug
N
L1

3. Access the machine control electronics
without disconnecting any wiring to the
control board. See page 10, figure 17.
4. With an ohmmeter, check for continuity
between the L1 terminal of the plug
(found in step 2) and P1-5 (black wire)
on the machine control board.

COM

G
G

➔ If there is continuity, go to step 5.
➔ If there is no continuity, check that
wires to the terminal block are mechanically secure. If so, replace the
main wire harness and test the dryer.
5. Check for continuity between the neutral
(N) terminal of the plug and P1-2 (white
wire) at the control board.
➔ If there is continuity, go to step 6.

Figure 5. Power cord terminals, gas
dryer.
4. In a similar way, check the continuity
between the L1 terminal of the plug and
P1-5 (black wire) on the control board.
➔ If there is continuity, replace the
control board.
➔ If there is no continuity, check the
continuity of the power cord in a
similar way to that illustrated in
figure 5, but for power cord's L1 wire.

➔ If there is no continuity and the
mechanical connections of the wire
are secure, replace the main wire
harness.
6. Replace the machine control electronics.
See Removing the Machine Control
Electronics, page 10.

➔ If an open circuit is found, replace the
power cord. Otherwise, go to step 5.
5. Replace the main harness.

FOR SERVICE TECHNICIAN'S USE ONLY

TECH SHEET - DO NOT DISCARD

PAGE 5

TEST #2

Drive Motor
Switch

Motor Circuit Test
This test will check the wiring to the motor
and the motor itself. The following items are
part of this system:
Part of Motor System
–
–
–
–
–
–

Electric
Dryer

Gas
Dryer

✔
✔
✔
✔
✔
✔

✔
no
✔
✔
✔
✔

Harness/connection
Thermal fuse
Belt/belt switch
Motor
Door switch
Machine control
electronics. See ESD
information, page 1.

1. Disconnect dryer from power. Access the
machine control electronics and measure
the resistance across P1-3 and P1-4.
See Accessing & Removing the Electronic Assemblies, page 10.

White Connector
Blue Wires

Figure 7. Remove white connector.
5. Using figure 8, check for the resistance
values of the motor’s Main and Start
winding coils as shown below.

WINDING

RESISTANCE
(Ω)

CONTACT POINTS
OF MEASUREMENT

MAIN

2.4 Ω - 3.6 Ω

Blue wire in back and
white/orange wire

START

2.4 Ω - 3.8 Ω

Blue wire in back and
violet wire

➔ Otherwise, go to step 2.

ELECTRIC DRYER ONLY: Check the
thermal fuse. See TEST #3b, page 7.

Main Winding:
Blue Wire in Back and
White/Orange Wire

➔ If the Start winding is in question and
the resistance is much greater than
4 Ωs, replace the motor.
7. Door Switch problems can be uncovered
in the Diagnostic Door Switch Test on
page 1; however, if this was not done,
the following can be done without
applying power to the dryer. Connect
an ohmmeter across P1-2 (neutral,
white wire) and P1-3 (door, blue wire).
With the door properly closed, the
ohmmeter should indicate a closed
circuit (0-2 ohms). If not, replace the door
switch assembly.

TEST #3

ALL DRYERS: Continue with step 3
below to test the remaining components
in the motor circuit.

Heater Test
Start
Winding:
Blue Wire
in Back and
Violet Wire

3. Check the belt switch and motor. Access
the belt switch and motor by removing
the back panel. See page 11. Carefully
remove the drum belt from the springloaded belt switch pulley, gently letting
the belt switch pulley down. See figure 6.

NOTE: These tests are done with dryer
disconnected from power.
This test is performed when either of the
following situations occur:
✔ Dryer doesn’t heat
✔ Heat won’t shut off

Belt Switch
Pulley

Figure 8. Main and start winding
measure points.
➔ If the resistance at the motor is
correct, then there is an open circuit
between the motor and machine
control electronics. Check for failed
belt switch.

Drum Belt

Figure 6. Carefully remove drum belt.

Belt Switch

Figure 9. Checking the belt switch.

NOTE: Main and Start winding coils must
be checked at the motor.

➔ If resistance across P1-3 and P1-4 is
in the range of 2 to 4 ohms, replace
the machine control electronics.
2. Check the wiring and components in the
path between these measurement points
by referring to the appropriate wiring
diagram (gas or electric) on page 3.

Belt Switch
Pulley

6. Check the belt switch by measuring
resistance between the two blue wires,
as shown in figure 9, while pushing up
the belt switch pulley.

4. Remove the white connector from the
drive motor switch. See figure 7.

➔ If the resistance reading goes from
infinity to a few ohms as pulley arm
closes the switch, belt switch is OK.
If not, replace the belt switch.
➔ If belt switch is OK and there is still an
open circuit, check and repair the
wiring harness.

FOR SERVICE TECHNICIAN'S USE ONLY

This test checks the components making up
the heating circuit. The following items are
part of this system:
Part of Heating System

Electric
Dryer

Gas
Dryer

Harness/connection
Heater relay
Thermal cut-off
Thermal fuse
High limit thermostat
Heat element assembly
Gas burner assembly
Centrifugal switch
Thermistor
Machine control
electronics. See ESD
information, page 1.
– Console electronics
– Gas supply

✔
✔
✔
no
✔
✔
no
✔
✔
✔

✔
✔
no
✔
✔
no
✔
✔
✔
✔

✔
no

✔
✔

–
–
–
–
–
–
–
–
–
–

PART NO. 3980060

PAGE 6

TECH SHEET - DO NOT DISCARD

Dryer does not heat:
Remove the toe panel to access the thermal
components. See figure 15, page 10. Locate
the components for the electric and gas
dryers using figure 10 below.
ELECTRIC DRYER:
1. Using an ohmmeter and referring to the
wiring diagram, measure the resistance
from the red wire at the thermal cutoff to
the red wire at the heater.
➔ If the resistance is about 10 ohms, go
to step 3.

➔ If there is an open circuit, replace the
high limit thermostat.

thermistor or wire harness is either
shorted or open.

➔ Otherwise, go to step 3.

➔ Disconnect dryer from power. Check
wire connections at the machine
control electronics and thermistor.
See Accessing the Machine Control
Electronics on page 10, and for
thermistor location see figure 10
below.

3. Perform TEST #3d (Gas Valve Test),
page 7. If this is OK, replace the machine
control electronics.

Heat will not shut off:
1. Access the machine control electronics,
and measure the resistance between
P2-5 (red/white wire) and P2-6 (black
wire). See Accessing & Removing the
Electronic Assemblies, page 10.

➔ If wire connections are good, remove
the two wires from the thermistor and
replace the thermistor. See figure 10.
Plug dryer back into supply outlet.

➔ If an open circuit is detected, go to
step 2.

➔ If 6-7 k ohms are measured, replace
the machine control electronics.

2. Visually check the wire connections to
the thermal cutoff, high limit thermostat,
and heater. If connections look good,
check for continuity across each of these
components. Replace the one that is
electrically open.

➔ If the resistance is much greater than
7 k ohms, replace the thermistor.

3. If no open circuit is detected, measure
the resistance between P2-5 (red/white
wire) and P2-6 (black wire) at the
machine control board.

TEST #3a
Thermistor Test
The machine control electronics monitors
the exhaust temperature using the
thermistor, and cycles the heater relay on
and off to maintain the desired temperature.

➔ If 6-7 k ohms are measured, replace
the machine control electronics.

Begin with an empty dryer and a clean lint
screen.

➔ If the resistance is less than 1 k ohm,
replace the thermistor.

1. Plug in the dryer and set the following
configuration:

GAS DRYER:

➔ Door - must be firmly closed

1. Perform TEST #3b, page 7. If the thermal
fuse is OK, go to step 2.

➔ Press TIMED DRY

2. Locate the high limit thermostat. See
figure 10. Measure the continuity through
it by connecting the meter probes on the
red wire and blue wire.

➔ Press END OF CYCLE SIGNAL
(HIGH)

3. If E1 or E2 does not flash in the display,
the connections to the thermistor are
good. Therefore, check the thermistor’s
resistance value at any or all of the
temperature levels in question, using the
Timed Dry Cycle, and the following
process:
Hold a glass bulb thermometer capable
of reading from 90° to 180°F (32° to
82°C) in the center of the exhaust outlet.
The correct exhaust temperatures are as
follows:
EXHAUST TEMPERATURES
TEMPERATURE
SETTING

HEAT TURNS
OFF

HIGH

155° ± 10°F
(68° ± 6°C)

MEDIUM HIGH

150° ± 10°F
(66° ± 6°C)

MEDIUM

140° ± 10°F
(60° ± 6°C)

LOW

125° ± 10°F
(52° ± 6°C)

EXTRA LOW

105° ± 5°F
(41° ± 3°C)

➔ Press START
2. If after 60 seconds, E1 or E2 flashes in
the display and the dryer shuts off, the

Heater Element
Thermal Cut-Off
Flame
Sensor

High Limit
Thermostat

4. If the exhaust temperature is not within
specified limits, check the resistance of
the thermistor.

The table below gives the resistance
values that should be observed for the
various temperature settings.
TEMP.
SETTING TEMPERATURE

Thermal Fuse
Thermistor

Electric Dryer
Figure 10. Thermal Components, viewed from front.

PART NO. 3980060

10 - 15°F
(6 - 8°C)
below the heat
turn off
temperature

NOTE: All thermistor resistance
measurements must be made while
dryer is disconnected from power.

High Limit Thermostat

Thermal Fuse

HEAT TURNS
ON

Thermistor

Gas Dryer

Thermistor resistance
value at heater
shutoff (digital or
analog meter) kΩ

HIGH

155° ± 10°F
(68° ± 6°C)

2.5

1.5

MEDIUM
HIGH

150° ± 10°F
(66° ± 6°C)

3.0

2.7

MEDIUM

140° ± 10°F
(60° ± 6°C)

4.0

3.0

LOW

125° ± 10°F
(52° ± 6°C)

4.3

EXTRA
LOW

105° ± 5°F
(41° ± 3°C)

FOR SERVICE TECHNICIAN'S USE ONLY

TECH SHEET - DO NOT DISCARD

If needed, the following table gives
temperatures and their associated
resistance values.

PAGE 7

shown in the following chart. If not, replace
coil.
Terminals Resistance
1 to 2
1 to 3
4 to 5

THERMISTOR RESISTANCE
TEMP.
°F (°C)

RES.
kΩ

TEMP.
°F (°C)

RES.
kΩ

50° (10°)

19.9

80° (27°)

9.2

60° (16°)

15.3

90° (32°)

7.4

70° (21°)

11.9

100° (38°)

5.7

➔ If the thermistor resistance checks
within normal limits, replace the
machine control electronics.

1365Ω ± 25
560Ω ± 25
1220Ω ± 50

IMPORTANT:
Be sure all harness
wires are looped back
through the strain relief
after checking or replacing coils.

TEST #4
Moisture Sensor Test

TEST #3b
Thermal Fuse Test
1. Disconnect dryer from power.
2. Access the thermal fuse by first removing the toe panel. See Removing the Toe
Panel, page 10, and figure 10 on page 6
for thermal fuse location.
ELECTRIC DRYER: The thermal fuse is
wired in series with the dryer drive motor. If
the thermal fuse is open, replace it.
GAS DRYER: The thermal fuse is wired in
series with the dryer gas valve. If the thermal
fuse is open, replace it.

TEST #3c
Thermal Cut-Off Test, Electric
Dryer Only
If the dryer does not heat while 240 volts is
being delivered to it, check the status of the
thermal cut-off.

3. Using an ohmmeter, check the continuity
across the thermal cut-off. See figure 10
for location.

Gas Valve Test, Gas Dryer Only
Access the gas valve by first removing the
toe panel. See Removing the Toe Panel,
page 10.
Use an ohmmeter to determine if a gas
valve coil has failed. Remove harness
plugs. Measure resistance across
terminals. Readings should match those

Drum

FRONT

This test is performed when an automatic
cycle stops too soon, or runs much longer
than expected.
NOTE: Dryer will shut down automatically
after 2½ hours.
The following items are part of this system:
– Harness/connection
– Metal sensor strips
– Machine control electronics

Harness
Connection
Blower
Housing

1. Enter the Diagnostic Test mode. See
procedure on page 1.
2. Open the dryer door. If a beep tone is
heard and a software revision number is
displayed on the console as soon as the
door is opened, a short circuit exists in
the moisture sensor system.
➔ If this doesn't happen, go to step 3.
➔ Otherwise, go to step 4.
NOTE: Over drying may be caused by a
short circuit in the sensor system.
3. Locate the two metal sensor strips on the
face of the lint screen housing. Bridge
these strips with a wet cloth or finger.
➔ If a beep tone is heard and a software
revision number is displayed on the
console, the sensor passes the test.
Go to step 4.

➔ If the ohmmeter indicates an open
circuit, replace the failed thermal
cut-off and high limit thermostat. In
addition, check for failed heat
element, or blocked or improper
exhaust system.

TEST #3d

5. Access the moisture sensor by removing
the toe panel (see Removing the toe
panel, page 10). Disconnect the sensor
from the wire harness. See figure 11.

NOTE: This test is started with the machine
completely assembled.

1. Disconnect dryer from the 240V supply.
2. Access the thermal cut-off by first
removing the toe panel. See Removing
the Toe Panel, page 10.

connector P2 on the machine control
board. If a resistance less than 1 MΩ
is measured (with analog or digital
ohmmeter), inspect the control board
for any debris bridging these pins. If
no debris, replace the machine
control electronics.

➔ If not, disconnect dryer from power.
Access the moisture sensor wires by
removing the toe panel (page 10,
figure 15) and disconnecting the
sensor wires from the harness
(figure 11). Go to step 7.
4. Disconnect dryer from power. Access the
machine control electronics. See page
10. Remove the connector P2 from the
circuit board. Measure the resistance
across terminals 1 (yellow/red wire)
and 2 (black wire).

FOR SERVICE TECHNICIAN'S USE ONLY

➔ If the ohmmeter does not indicate
(infinity) open circuit, go to step 5.
➔ Otherwise, measure the resistance
across between pins 1 and 2 of

Figure 11. Disconnect sensor from
wire harness.
Measure the resistance
across the outermost
contacts of the cable that
includes the two red MOVs.
➔ If a small resistance is measured,
replace this component (Wire
Harness, Moisture Sensor).
➔ Otherwise go to step 6.
6. Measure the resistance across the pins
of the mating connector. If a small
resistance is measured here, replace this
harness (Digital Wire Harness).
7. Measure the resistance
across each of the outermost
contacts and the center
terminal (ground connection).
➔ If a resistance less than infinity is
measured, replace this component
(Wire Harness, Moisture Sensor).
8. If moisture sensor diagnostic test
passes, check the thermistor: Perform
TEST #3a, page 6.
➔ If the problem persists after replacing
the moisture sensor and thermistor,
replace the machine control
electronics.

PART NO. 3980060

PAGE 8

TECH SHEET - DO NOT DISCARD

CHECKING FUNCTIONS OF BUTTONS
Before replacing the machine control electronics,
check for proper button function as follows:

BUTTON

+ LEAD

– LEAD

HEAVY DUTY

P3-14

P3-11

JEANS

P3-14

P3-9

NORMAL

P3-13

P3-11

TEMPERATURE

P3-12

P3-8

CASUAL

P3-12

P3-11

ULTRA DELICATE

P3-14

P3-10

EXPRESS DRY

P3-13

P3-10

DELICATE

P3-12

P3-10

TIMED DRY

P3-13

P3-9

DAMP DRY SIGNAL

P3-14

P3-8

WRINKLE GUARD

P3-13

P3-8

TOUCH UP

P3-12

P3-9

AUTO DRY LEVEL

P3-14

P3-7

MORE TIME

P3-13

P3-7

LESS TIME

P3-12

P3-7

END OF CYCLE SIGNAL

P3-12

P4-2

START

P3-14

P4-2

PAUSE/CANCEL

P3-13

P4-2

■ Disconnect the power cord from the outlet.
■ See Accessing the Machine Control

Electronics on page 10 and remove
connectors P3 and P4 from the machine
control electronics (see figure 13, page 9, for
connector locations).
Using the table at right, measure the resistance
across the switch when the button is pressed.
NOTE: The meter must be connected with the
proper polarity.
➔ If the meter responds to the button being
pressed, it indicates the button is
operating. The button is a momentary
connection, so the meter can respond only
while the button is being pressed.
➔ If any switches fail this test, replace the
console electronics and housing.
➔ If all switches test OK, replace the machine
control electronics. See page 10.

TEST #5
Button and LED Test
Refer to the Diagnostic Test on page 1 and
activate the Diagnostic Test Mode. Check for
the following situations:
✔ None of the LEDs light up
✔ A particular group of LEDs does

not light up
✔ A single LED does not light up
✔ No beep sound is heard
✔ No dryer function is activated

when a particular button is
pressed
✔ E3 error code is displayed

Electronics on page 10. If these
connections are good, perform the
checks described in Checking Functions
of Buttons in box above.

A particular group of LEDs does not
light up:
A group or combination of LEDs share a
common electronic connection. If this
connection is open, all of the LEDs in the
group will be disabled. Replace the console
electronics and housing.

A single LED does not light up:
Press the button associated with the LED
several times. If the LED does not light up, the
LED has failed. Replace the console
electronics and housing.

None of the LEDs light up:

No beep sound is heard:

1. See Diagnostic Guide/Before Servicing...
on page 1.

If the associated LEDs do light up, it is
possible that the beeper circuit has failed.
Check button functioning (see box above)
before replacing the machine control
electronics.

2. Visually check that connectors P3 and
P4 are inserted all the way into the
machine control electronics. See
Accessing the Machine Control

PART NO. 3980060

No dryer function is activated when
a particular button is pressed:
If the associated LEDs do light up, it is
possible that the machine control electronics
has failed. Check button functioning (see box
above) before replacing the machine control
electronics.

E3 error code is displayed:
If the E3 error code is displayed, there is a
user interface or software mismatch. It is also
possible that a component on the console
electronics or the machine control electronics
has failed. Check button functioning (see box
above) before replacing the machine control
electronics.

FOR SERVICE TECHNICIAN'S USE ONLY

TECH SHEET - DO NOT DISCARD

PAGE 9

TEST #6
See Accessing & Removing the
Electronic Assemblies, page 10, to access:
■ Machine Control Electronics
See Removing the Back
■ Console Electronics
Panel, page 11, to access:
and Housing
■ Drum Light Assembly
■ Blower/Motor Assembly

Door Switch Test
Go into the Diagnostic Test Mode. See
page 1. Functionality is verified with a beep
each time the door is closed and opened,
and a number and letter appears in the
display (i.e., “0E”, “0G”, “1E”, or “2G” etc.).
➔ If any of the above conditions are not
met, or if one of the dryer model
codes listed above is displayed when
the door is closed, check that the
wires between the door switch and
machine control electronics are
connected. See figure 12 below for
switch location, and see Accessing
the Machine Control Electronics,
page 10.

Door
Switch

FRONT

TOP OF
DRUM

Door Switch

Figure 12. Door switch location.
➔ If the connections are OK, replace the
wire and door switch assembly and
retest.
➔ If wire and door assembly have been
replaced and dryer still does not start,
then replace the machine control
electronics.

See Removing the Toe Panel,
page 10, to access:
■ Moisture Sensors
Moisture Sensor
■ Thermistor
Strips
■ Thermal Cut-off
■ Thermostat
■ Heater Assembly (Electric or Gas)

Heater
Assembly

Figure 14. Component locations

Console
Motor Mounting Heater Red/White Open (Elec.)
White Blue
Screw
Relay
Relay
Blue
Black (Gas) Black
Green/
Black
Yellow/Red
Yellow
Black
N.O.
Open

Figure 13.

Date CodeYDDD

P/N XXXXXXX Rev X

COM

Machine control electronics

FOR SERVICE TECHNICIAN'S USE ONLY

PART NO. 3980060

PAGE 10

TECH SHEET - DO NOT DISCARD

REMOVING THE TOE PANEL
1. Remove two screws below the toe panel.
2. Slide the toe panel down, then pull it out
from the bottom. See figure 15.

Accessing the Machine Control
Electronics

Removing the Machine Control
Electronics

1. After locating the machine control
electronics, remove the three screws that
hold the machine control bracket in place
and remove assembly. See figure 17.

Remove all the wire connections to the
machine control board. See figure 13,
page 9.

Flange

Machine Control
Electronics
Assembly

FRONT

There are two plastic legs on each side of
the circuit board that fasten it to the
mounting bracket. With pliers, squeeze the
leg while pulling up until it becomes
unlatched from the mounting bracket. Do
this at all four plastic legs, then lift the circuit
board from mounting bracket.

Accessing the Console Electronics
and Housing

Figure 15. Pull the toe panel down to
clear flanges, then pull panel out.
Figure 17. Remove assembly from
mounting position.

ACCESSING & REMOVING
THE ELECTRONIC
ASSEMBLIES
There are two electronic assemblies; the
Console Electronics and Housing, and the
Machine Control Electronics. See figure 16.
Machine Control
Electronics Assembly

Console Electronics
and Housing (inside)

2. As you remove the assembly from its
mounting position, rotate the assembly
up to access the machine control circuit
board, and set it on the side panel. See
figure 18.
Machine Control
Electronics
Assembly

1. After locating the machine control
electronics, disconnect the ribbon cables
that run between the console and the
machine control board. Make the
disconnection at the machine control
side. Remove the two screws that fasten
the console assembly to dryer. Then
remove the console assembly, sliding it
up and off from the front of the machine.
See figure 19.
Ribbon Cable Connection Point

FRONT

Ribbon Cable

FRONT

Figure 19. Rotate assembly up to
access the machine control circuit board.

Figure 18. Rotate assembly up to
access the machine control circuit board.

Figure 16. Locate the electronic
assemblies.

PART NO. 3980060

FOR SERVICE TECHNICIAN'S USE ONLY

TECH SHEET - DO NOT DISCARD

2. Remove the screws that fasten the
console mounting bracket onto the
assembly. Lift up and remove the bracket
to locate the electronics assembly. See
figure 20.

PAGE 11

4. Unlatch them gently with a screw driver
while pulling the electronics housing
assembly out. See figure 22.

REMOVING THE BACK
PANEL
After removing the top panel, remove the
cover plate. Then remove ten screws from
the back panel, plus two screws on the back
panel’s top edge, which connect the back
panel to the side panels’ top edges. See
figure 24.

Console
Mounting Bracket

ELECTRIC DRYER: In addition to the
above, remove the ground wire and screw
from back panel. Also disconnect the power
cord from the terminal block, and then
remove the terminal block from the back
panel.
Figure 22. Unlatch gently with
screwdriver.

Console Electronics and
Housing Assembly

Figure 20. Remove mounting bracket
and locate electronics assembly.

Ground Screw Location Electric Models Only

Cover Plate

5. Gently pull the console electronics
housing away from the decorative piece.
See figure 23.

3. The console electronics and housing assembly is held to the decorative piece by
seven plastic latches. See figure 21.

Console electronics
and housing

Decorative piece

Figure 21. Locate seven plastic latches.

FOR SERVICE TECHNICIAN'S USE ONLY

Figure 23. Gently pull console housing
away from decorative piece.

Figure 24. Remove 12 screws (13 for
electric models).

PART NO. 3980060

PAGE 12

TECH SHEET - DO NOT DISCARD

MANUFACTURED UNDER ONE OR MORE
OF THE FOLLOWING U.S. PATENTS:
4,385,452
4,430,809
4,663,861
4,669,200
4,700,495

4,720,925
4,754,556
4,821,535
4,840,285
4,865,366

4,899,264
4,899,464
4,908,959
5,066,050
5,243,771

5,560,120
5,636,453
5,651,188
5,664,339
D314,261

D314,262

PART NO. 3980060

FOR SERVICE TECHNICIAN'S USE ONLY

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Modify Date                     : 2002:10:17 10:28:02
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Metadata Date                   : 2002:10:08 20:14:36Z
Creator                         : anelson
Title                           : ZB20734_3980060.vp

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ZB20734_3980060.vp Kenmore Whirlpool Dryer Tech Sheet 110.82832100

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