ZB20734_3980060.vp Kenmore Whirlpool Dryer Tech Sheet 110.82832100

2013-04-09

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TECH SHEET - DO NOT DISCARD PAGE 1

FOR SERVICE TECHNICIAN'S USE ONLY PART NO. 3980060

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

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.

■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 machine control

electronics by edges only.

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

observe above instructions.

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.

DISPLAY DESCRIPTION EXPLANATION AND RECOMMENDED PROCEDURE

POWER FAILURE “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.

THERMISTOR OPEN “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.

DIAGNOSTIC GUIDE

Before servicing, check the following:

■Is the power cord firmly plugged into a

live circuit with proper voltage?

■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 a

VOMorDVM 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.

■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.

■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.

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.

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.

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.

If no indicators come on after pressing

the Manual Cycle buttons, go to

TEST #1 (Supply Connections), page 4.

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

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

awet 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”.

PART NO. 3980060 FOR SERVICE TECHNICIAN'S USE ONLY

PAGE 2 TECH SHEET - DO NOT DISCARD

Button

controls

all LEDs

above button

Each cycle select

button controls

only its own LED

Start button

controls

Status LEDs

Start button

turns on Dryer

(and controls

Status LEDs)

Button

controls

all LEDs

above button

Button

controls

all LEDs

above button

This button controls

the left digit

This button controls

the right digit

Each button

controls only

its own LED

Tur ns off all LEDs

and exits

diagnostic mode

Figure 1.

Console Diagnostics

COMPONENT

PART NUMBER

Electric

Dryers Gas

Dryers

Console Electronics and Housing

for White/Graphite Models: 82822

84832

92822

94832

8529879

—

8529879

for Bisque/Graphite Models: 82824

84834

92824

94834

8529880

—

8529880

for Graphite/Black Models: 82826

84836

92826

94836

8529881

—

8529881

Machine Control Electronics 3980062 3980062

Main Wire Harness 8299926 8299927

Digital Wire Harness 8299925 8299929

Wire Harness, Moisture Sensor 3406653 3406653

Wire Harness, Gas Valve — 3401850

Door Switch 8519323 8519323

Wire and Door Switch Assembly 8283288 8283288

Belt Switch 3394881 3394881

Thermal Cut-Off 8318314 —

Thermal Fuse 3390719 3390719

Heat Element Assembly 8527865 —

Gas Burner Assembly — 8318276

High Limit Thermostat 3391914 3403140

Drive Motor 3395654 3395654

Thermistor - NTC 10k Ohms 3976615 3976615

Add Model Selector p/n 8519455. Insert Model Selector into rear

of the console electronics.

Blue White Green/

Yellow

Black

Pluggable Drive

Motor Switch

Drum Size: Drum Speed:

7.0 cubic feet 51.5 ± 3 RPM CW

ELECTRIC DRYER

1M 2M 3M 5M 6M

Contacts closed

Contacts

Function

Start

Run

Centrifugal Switch (Motor)

3M 5M 6M

Contacts closed

Contacts

Function

Start

Run

Centrifugal Switch (Motor)

BLACK

BLUE

WHITE

Gas Valve

Red

Blue White Green/

Yellow

Red

Pluggable Drive

Motor Switch

GAS DRYER

TECH SHEET - DO NOT DISCARD PAGE 3

FOR SERVICE TECHNICIAN'S USE ONLY PART NO. 3980060

120 VOLTS

FS2

FS1

VALVE

NO. 1

IG IGR IGNITOR

50-500

HOLD ASSIST

MAIN

22,000 BTU/HR

VALVE

NO. 2

FLAME

SENSOR

L1 LINE - BLACK WHITE - NEUTRAL N

DOOR

SWITCH

RED

DRIVE MOTOR

4M MAIN

2.4 - 3.6

START

2.4 - 3.8

BLACK DL

THERMAL FUSE

196°F (91°C)

HIGH LIMIT

THERMOSTAT

205°F (96°C)

DRUM LAMP

BLUE

BROWN

BELT

SWITCH

WHITE

BLUE

HS1 HS2

TF1 TF2

THERMISTOR

ELECTRONIC

CONTROL

DOOR

TEMP.

MODEL RTN

USER INTERFACE

(ACTIVE OVERLAY or

ALTERNATE TECHNOLOGY)

MOTOR

HEATER RTN

HEATER +V

10k ± 3%

P1-3

P2-5

P2-4

P1-4

P1-5

HEATER

RELAY

NEUTRAL P1-2 NEUTRAL

MODEL P2-3

N.O.

(0.250 TERMINAL)

COM

(0.250 TERMINAL)

N.C.

TEMP RTN P2-6

P2-7

MOIST RTN

MOIST. P2-1

P2-2

SENSOR

MOVS

VALVE

MOV

GRN/YEL

P1-1

WHITE

BLK

YEL/RED

RED/WHT

RED

120 VOLTS

240 VOLTS

BLACK

L1 LINE - - LINE L2RED

WHITE

DOOR

SWITCH

- NEUTRAL

RED/WHITE

DRIVE MOTOR

1/3 H.P.

4M MAIN

START

THERMISTOR

BLACK DL

HEATER

RED BLACK

CONTROL

THERMAL CUT-OFF

(TCO) 352° F (178° C)

NEUTRAL

TERMINAL

LINKED TO

CABINET

CENTRIFUGAL SWITCH

THERMAL FUSE

196° F (91° C)

HIGH LIMIT

THERMOSTAT

250° F (121° C)

DOOR

DRUM LAMP

MOIST RTN

MOIST.

TEMP.

SENSOR

COM

BLUE

RED

BROWN

BLUE BLUE

BELT

SWITCH

WHITE

MODEL RTN

USER INTERFACE

(ACTIVE OVERLAY or

ALTERNATE TECHNOLOGY)

MOTOR

HEATER RTN

HEATER +V

10k ± 3%

P1-3

P2-1

P2-2

P2-5

P2-4

P1-4

P1-5

HEATER

RELAY

NEUTRAL P1-2 NEUTRAL

MODEL

P2-3

N.O.

(0.250 TERMINAL)

COM

(0.250 TERMINAL)

N.C.

TEMP RTN

P2-6

P2-7

SENSOR

MOVS

GRN/YEL

P1-1

YEL/RED

BLK

RED/WHT

BLK

WHITE

7.8-11.8

BLUE

WHITE

BLUE

BLK

SENSOR

COM

2.4 - 3.6

2.4 - 3.8

CENTRIFUGAL

SWITCH

ELECTRONIC

ELECTRIC DRYER WIRING DIAGRAM IMPORTANT: Electrostatic (static electricity)

discharge may cause damage to machine

control electronics. See page 1 for details.

GAS DRYER WIRING DIAGRAM

PART NO. 3980060 FOR SERVICE TECHNICIAN'S USE ONLY

PAGE 4 TECH SHEET - DO NOT DISCARD

PROBLEM POSSIBLE CAUSE / TEST

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

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 com-

pletely 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.

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

TROUBLESHOOTING GUIDE

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

GAS DRYER

1. After removing the cover plate, check

that the power cord is firmly connected to

the dryer's wire harness. See figure 4.

2. Access the machine control electronics

without disconnecting any wiring to the

control board. See page 10, figure 17.

3. With an ohmmeter, check for continuity

between the neutral (N) terminal of the

plug and P1-2 (white wire) on the ma-

chine control board. The left-hand side of

figure 5 shows the position of the neutral

terminal (N) on the power cord's plug.

➔If there is continuity, go to step 4.

➔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.

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 an open circuit is found, replace the

power cord. Otherwise, go to step 5.

5. Replace the main harness.

TROUBLESHOOTING TESTS

NOTE: These checks are done with the

dryer disconnected from power.

TEST #1

Supply Connections

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.

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.

➔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.

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.

➔If there is continuity, go to step 5.

➔If there is no continuity, check that

wires to the terminal block are me-

chanically 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.

➔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.

COM

NL1

Power Cord

Plug Te r minal Block

Figure 3.

Plug-to-terminal connections

for electric dryer.

COM

Power Cord

Plug

Figure 5.

Power cord terminals, gas

dryer.

Power Cord

Wire

Harness

Figure 4.

Power cord-to-wire harness

connection for gas dryer.

Remove

Screw

Te r minal

Block Cover

Figure 2.

Remove the cover plate.

TECH SHEET - DO NOT DISCARD PAGE 5

FOR SERVICE TECHNICIAN'S USE ONLY PART NO. 3980060

TEST #2

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

–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 Elec-

tronic Assemblies, page 10.

➔If resistance across P1-3 and P1-4 is

in the range of 2 to 4 ohms, replace

the machine control electronics.

➔Otherwise, go to step 2.

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.

ELECTRIC DRYER ONLY: Check the

thermal fuse. See TEST #3b, page 7.

ALL DRYERS: Continue with step 3

below to test the remaining components

in the motor circuit.

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 spring-

loaded belt switch pulley, gently letting

the belt switch pulley down. See figure 6.

4. Remove the white connector from the

drive motor switch. See figure 7.

5. Using figure 8, check for the resistance

values of the motor’s Main and Start

winding coils as shown below.

NOTE: Main and Start winding coils must

be checked at the motor.

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

➔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.

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.

➔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.

➔If the Start winding is in question and

the resistance is much greater than

4Ωs, 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

Heater Test

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

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

✔

Belt SwitchBelt Switch

Pulley

Blue Wires

Figure 9.

Checking the belt switch.

Main Winding:andBlue Wire in Back

White/Orange Wire

Start

Winding:

and

Blue Wire

in Back

Violet Wire

Figure 8.

Main and start winding

measure points.

White Connector

Drive Motor

Switch

Figure 7.

Remove white connector.

Drum Belt

Belt Switch

Pulley

Figure 6.

Carefully remove drum belt.

PART NO. 3980060 FOR SERVICE TECHNICIAN'S USE ONLY

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 an open circuit is detected, go to

step 2.

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.

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.

➔If 6-7 k ohms are measured, replace

the machine control electronics.

➔If the resistance is less than 1 k ohm,

replace the thermistor.

GAS DRYER:

1. Perform TEST #3b, page 7. If the thermal

fuse is OK, go to step 2.

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.

➔If there is an open circuit, replace the

high limit thermostat.

➔Otherwise, go to step 3.

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 6-7 k ohms are measured, replace

the machine control electronics.

➔If the resistance is much greater than

7 k ohms, replace the thermistor.

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.

Begin with an empty dryer and a clean lint

screen.

1. Plug in the dryer and set the following

configuration:

➔Door - must be firmly closed

➔Press TIMED DRY

➔Press END OF CYCLE SIGNAL

(HIGH)

➔Press START

2. If after 60 seconds, E1 or E2 flashes in

the display and the dryer shuts off, the

thermistor or wire harness is either

shorted or open.

➔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.

➔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.

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 HEAT TURNS

HIGH 155°

10°F

(68°

6°C)

10 - 15°F

(6 - 8°C)

below the heat

turn off

temperature

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)

4. If the exhaust temperature is not within

specified limits, check the resistance of

the thermistor.

NOTE: All thermistor resistance

measurements must be made while

dryer is disconnected from power.

The table below gives the resistance

values that should be observed for the

various temperature settings.

TEMP.

SETTING TEMPERATURE

Thermistor resistance

value at heater

shutoff (digital or

analog meter) k

Ω

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) 54.3

EXTRA

LOW 105°

5°F

(41°

3°C) 65

Thermal Cut-Off

High Limit Thermostat

Heater Element

Flame

Sensor

High Limit

Thermostat

Thermal Fuse

Thermistor

Thermal Fuse

Thermistor

Figure 10.

Thermal Components, viewed from front.

Gas DryerElectric Dryer

TECH SHEET - DO NOT DISCARD PAGE 7

FOR SERVICE TECHNICIAN'S USE ONLY PART NO. 3980060

If needed, the following table gives

temperatures and their associated

resistance values.

THERMISTOR RESISTANCE

TEMP.

°F (°C) RES.

Ω

TEMP.

°F (°C) RES.

Ω

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.

TEST #3b

Thermal Fuse Test

1. Disconnect dryer from power.

2. Access the thermal fuse by first remov-

ing 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.

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.

3. Using an ohmmeter, check the continuity

across the thermal cut-off. See figure 10

for location.

➔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

Gas Valve Test, Gas Dryer Only

Access the gas valve by first removing the

toe panel. See Removing the Toe Panel,

page 10.

Useanohmmeter to determine if a gas

valve coil has failed. Remove harness

plugs. Measure resistance across

terminals. Readings should match those

shown in the following chart. If not, replace

coil.

Terminals Resistance

1to2 1365

Ω±

1to3 560

Ω±

4to5 1220

Ω±

IMPORTANT:

Be sure all harness

wires are looped back

through the strain relief

after checking or replacing coils.

TEST #4

Moisture Sensor Test

NOTE: This test is started with the machine

completely assembled.

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

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 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).

➔If the ohmmeter does not indicate

(infinity) open circuit, go to step 5.

➔Otherwise, measure the resistance

across between pins 1 and 2 of

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.

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.

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.

Blower

Housing

Drum

Harness

Connection

FRONT

Figure 11.

Disconnect sensor from

wire harness.

PART NO. 3980060 FOR SERVICE TECHNICIAN'S USE ONLY

PAGE 8 TECH SHEET - DO NOT DISCARD

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

None of the LEDs light up:

1. See Diagnostic Guide/Before Servicing...

on page 1.

2. Visually check that connectors P3 and

P4 are inserted all the way into the

machine control electronics. See

Accessing the Machine Control

Before replacing the machine control electronics,

check for proper button function as follows:

■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.

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

CHECKING FUNCTIONS OF BUTTONS

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.

No beep sound is heard:

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.

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.

TECH SHEET - DO NOT DISCARD PAGE 9

FOR SERVICE TECHNICIAN'S USE ONLY PART NO. 3980060

TEST #6

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.

➔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.

Moisture Sensor

Strips

Heater

Assembly

Door

Switch

■

Machine Control Electronics

Moisture Sensors

Thermistor

Thermal Cut-off

Thermostat

Assembly (Electric or Gas)

■

Heater

Drum Light Assembly

■

Blower/Motor Assembly

■

Console Electronics

and Housing

See Accessing & Removing the

Electronic Assemblies, page 10, to access:

See Removing the Back

Panel, page 11, to access:

See Removing the Toe Panel,

page 10, to access:

Figure 14.

Component locations

P/N XXXXXXX Rev X

Date Code YDDD

Green/

Yellow

White Blue

Black

Console

Mounting

Screw

Open

N.O.

COM

Blue Black

Red/White Open (Elec.)

Black (Gas) Yellow/Red

Black

Heater

Relay

Motor

Relay

Figure 13.

Machine control electronics

Door Switch

TOP OF

DRUM

FRONT

Figure 12.

Door switch location.

PART NO. 3980060 FOR SERVICE TECHNICIAN'S USE ONLY

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 & REMOVING

THE ELECTRONIC

ASSEMBLIES

There are two electronic assemblies; the

Console Electronics and Housing, and the

Machine Control Electronics. See figure 16.

Accessing 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.

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.

Removing the Machine Control

Electronics

Remove all the wire connections to the

machine control board. See figure 13,

page 9.

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

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.

Machine Control

Electronics Assembly

Console Electronics

and Housing (inside)

FRONT

Figure 16.

Locate the electronic

assemblies.

FRONT

Machine Control

Electronics

Assembly

Figure 17.

Remove assembly from

mounting position.

FRONT

Machine Control

Electronics

Assembly

Figure 18.

Rotate assembly up to

access the machine control circuit board.

Flange

Figure 15.

Pull the toe panel down to

clear flanges, then pull panel out.

Ribbon Cable Connection Point

Ribbon Cable

FRONT

Figure 19.

Rotate assembly up to

access the machine control circuit board.

TECH SHEET - DO NOT DISCARD PAGE 11

FOR SERVICE TECHNICIAN'S USE ONLY PART NO. 3980060

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.

3. The console electronics and housing as-

sembly is held to the decorative piece by

seven plastic latches. See figure 21.

4. Unlatch them gently with a screw driver

while pulling the electronics housing

assembly out. See figure 22.

5. Gently pull the console electronics

housing away from the decorative piece.

See figure 23.

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.

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.

Ground Screw Location -

Electric Models Only Cover Plate

Figure 24.

Remove 12 screws (13 for

electric models).

Figure 21.

Locate seven plastic latches.

Figure 22.

Unlatch gently with

screwdriver.

Console electronics

and housing

Decorative piece

Figure 23.

Gently pull console housing

away from decorative piece.

Console

Mounting Bracket

Console Electronics and

Housing Assembly

Figure 20.

Remove mounting bracket

and locate electronics assembly.

PART NO. 3980060 FOR SERVICE TECHNICIAN'S USE ONLY

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

ZB20734_3980060.vp Kenmore Whirlpool Dryer Tech Sheet 110.82832100

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