Kenmore W10035270 Tech Manual

TECH SHEET - DO NOT DISCARD PAGE 1

WARNING

Electrical Shock Hazard

Disconnect power before servicing.
Replace all parts and panels before operating.
Failure to do so can result in death or

electrical shock.

IMPORTANT

Electrostatic Discharge (ESD) Sensitive

Electronics

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

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.

-OR-

ACTIVATING THE DIAGNOSTIC TEST MODE

1. Be sure the dryer is in standby mode (plugged in with all
indicators off, or with only the Clothes Dry indicator on).

2. Select any one button (except Stop) and follow the steps below,
using the same button (remember the button):

Press/hold

2-5 seconds

3. If this test mode has been entered successfully, all indicators on
the console are illuminated for 5 seconds with
Estimated Time Remaining two-digit display.

DIAGNOSTIC: Unsuccessful Entry

If entry into diagnostic mode is unsuccessful, press the Stop button
twice, then press the Power button.

If indicators come on, try to use a different button than was used to

➔

activate the diagnostic test mode. If that button fails to enter the
diagnostic mode, something is faulty, and it is not possible to enter
the diagnostic mode. Go to TEST #2, page 7.

If no indicators come on after pressing the Power button, go to

➔

TEST #1, page 6.

DIAGNOSTIC: Saved Fault Codes

If there are saved fault codes, the most recent fault code will
alternately show “F-” and “XX” where XX is the fault code.

Press and release

the same button

used to activate

Diagnostics

Repeat
Repeat
Repeat

Release for

➔

2-5 seconds

Press/hold

➔

2-5 seconds

Release for

➔

2-5 seconds

➔

88 showing in the

➔

beep tone➔Second most recent fault code is displayed.

➔

beep tone➔Third most recent fault code is displayed.

➔

beep tone➔Fourth most recent fault code is displayed.

➔

All indicators momentarily turn off, then stay on.

Press/hold

2-5 seconds

DIAGNOSTIC GUIDE

Before servicing, check the following:

■

Make sure there is power at the wall outlet.

■

Has a household fuse blown or circuit breaker tripped? Time delay
fuse?

■

Is dryer vent properly installed and clear of lint or obstructions?

■

All tests/checks should be made with a VOM
(volt-ohm-milliammeter) or DVM (digital-voltmeter) 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.

■

A potential cause of a control not functioning is corrosion on
connections. Observe connections and check for continuity with an
ohmmeter.

■

Connectors: Look at top of connector. Check for broken or loose
wires. Check for wires not pressed into connector far enough to
engage metal barbs.

■

Resistance checks must be made with dryer unplugged or power
disconnected.

DIAGNOSTIC TESTS

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

DIAGNOSTIC: Console Buttons and Indicators

Pressing the console buttons or rotating the cycle selector will sound
a beep and will turn on or off the corresponding indicators as shown

Figure 1, Console Diagnostics, page 2. Pressing

in
will sound a beep and turn the left digit of the display on or off.
Pressing
the display on or off.

∨ (less time) will sound a beep and turn the right digit of

➔

If indicators fail to turn on or off and beep after pressing
buttons or rotating the cycle selector, go to TEST #6, page 10.

∧ (more time)

DIAGNOSTIC: Door Switch

Opening the door should cause a beep and an alphanumeric number
to be displayed. Closing the door should cause a beep and
displayed.

➔

If opening the door fails to cause a beep and a number and letter
to be displayed, go to TEST #7, page 10.

88 to be

DIAGNOSTIC: Moisture Sensor

Open the door and locate two metal strips on the face of the lint
screen housing. Bridge these strips with a wet cloth or a finger.

➔

If a continuous beep tone is heard and an alphanumeric number is
displayed on the console, the sensor is OK.

➔

If not, or if a continuous beep tone is heard before bridging the
moisture strips, go to TEST #5, page 10.

DIAGNOSTIC: Motor, Heater, and Console ID

Close the door. Press the Start button. The motor and heater will turn
on, and the display will show one of the following console IDs:

A0, A2, A6, A7, A8, A9, or AA.

FOR SERVICE TECHNICIAN’S USE ONLY PART NO. W10035270

TECH SHEET - DO NOT DISCARD PAGE 2

Power button controls Status

indicators at left.

“ Time” turns the

“More Time” button turns the

left digit of the display on or off.

Figure 1.

If none of the Console IDs above are displayed, replace the

➔

Console Diagnostics.

Less button

t digit of the display on or off.

righ

Rotating knob turns

indicators on or off.

Tu rns off all indicators and

exits diagnostic mode.

user interface assembly. See Accessing & Removing the
Electronic Assemblies, page 11.

If the motor does not turn on, go to TEST #3a, page 7.

➔
➔ If no heat is detected, go to TEST #4, page 8.

DIAGNOSTIC: Displaying Inlet Air Flow

Used to display the airflow value at the inlet of the heater box being
measured by the machine control.

After all saved fault codes have been displayed, press the Wrinkle
Guard button to activate airflow detection. A 30 or 50 second
countdown timer will start and the dryer will turn on.

➔ If the dryer is cold, the countdown will start at 50 seconds.

NOTE: If the dryer is extremely cold (less than 40°F [4.4°C]) the
airflow may not be detected properly, and “--” will be displayed.

➔

If the dryer is hot, the countdown timer will start at 30 seconds
(cool down period) followed by an additional 50 second
countdown.

A Dryness Level modifier LED will also be illuminated to indicate the
airflow range corresponding to the number displayed.

■

The More LED will be illuminated for airflow readings above 40 cfm.

■

The Normal LED will be illuminated for airflow readings between
29 and 40 cfm.

■

The Less LED will be illuminated for airflow readings less than
29 cfm.

➔

If airflow value is low, check to make sure the lint screen is
clean, the door seal is in place and the vent is not obstructed.

Start button turns on dryer.

Dryness Level

button controls

all indicators

above button.

The Less LED will be illuminated for low voltage readings (below

■

Te mperature

button controls

all indicators

above button.

Each button controls

its own indicators.

200 VAC).

If the line voltage is not seen on L2 the display will flash

➔

Go to TEST #1, page 6.

DEACTIVATING THE DIAGNOSTIC TEST MODE

Press the Stop button twice to exit diagnostics.

ACTIVATING THE MANUAL LOAD TEST

1. Be sure the dryer is in standby mode (plugged in with all
indicators off, or with only the Clothes Dry indicator on).

2. Select any one button (except Stop) and follow the steps below,
using the same button (remember the button):

Press/
hold 2-5
seconds

➔

seconds

Release

for 2-5

➔

hold 2-5
seconds

Press/

➔

Release

for 2-5

seconds

➔

hold 2-5
seconds

Press/

➔

seconds

Release

for 2-5

88 flashes momentarily, the motor starts right away, and the Heavy

Duty LED flashes (this step starts the Manual Load sequence):

1. Turn on motor.

Now press any key (except Stop) and the control will advance
through each step of the following sequence:

SINGLE ELEMENT MODELS:

2. Motor + heater.

3. No loads on (motor + heater off).

4. Repeat using same button.

➔

Flash “Heavy Duty” LED.

➔

Flash “Casual” LED.

➔

Flash “Normal” LED.

➔

Start sequence again at 1.

L2.

➔

hold 2-5
seconds

Press/

DIAGNOSTIC: Displaying Line Voltage

Used to display the line voltage currently being measured by the
machine control:

After all saved fault codes have been displayed, press the Cycle
Signal button. The last 2 digits of the voltage value will be displayed
on the dual 7-segment display.

A Dryness Level modifier LED will also be illuminated to indicate the
voltage range corresponding to the number displayed. The Dryness
Level LEDs relate to specific voltage ranges as follows:

■

The More LED will be illuminated for high voltage readings (above
260 VAC).

■

The Normal LED will be illuminated for normal voltage readings
(200-260 VAC).

FOR SERVICE TECHNICIAN’S USE ONLY PART NO. W10035270

DUAL ELEMENT MODELS:

2. Motor + heater 1.

3. Motor + heater 2.

4. Motor + heater 1 + heater 2 + drum light.

5. No loads on (motor + heaters off).

6. Repeat using same button.

➔

Flash “Casual” LED.

➔

Flash “Timed Dry” LED.

➔

Flash “Drum Light” LED.

➔

Flash “Normal” LED.

➔

Start sequence again at 1.

DEACTIVATING THE MANUAL LOAD TEST

Press the Stop button to exit this mode.

TECH SHEET - DO NOT DISCARD PAGE 3

DISPLAY FAULT CODES

The fault codes below would be indicated when attempting to start a
drying cycle or after activating the diagnostic test mode.

DISPLAY DESCRIPTION EXPLANATION / RECOMMENDED PROCEDURE

PF flashes to indicate that a power failure
occurred while the dryer was running. Press
START to continue the cycle, or press STOP to
clear the display.

AF flashes if a restricted airflow condition exists.
Check to make sure the lint screen is clean, the
door seal is in place and the vent is not
obstructed.

F-01 flashes when there is a primary control
failure. Replace the machine control electronics.
See Accessing & Removing the Electronic
Assemblies, page 11.

F-02 flashes when there is a stuck button or user
interface mismatch. This fault code will ONLY
appear when in the diagnostic test mode. See
TEST #6, page 10.

F-22 flashes if the exhaust thermistor is open.
See TEST #4a, page 9.

F-23 flashes if the exhaust thermistor has
shorted. See TEST #4a, page 9.

F-24 flashes if the inlet thermistor is open.
This fault code will ONLY appear when in the
diagnostic test mode. See TEST #4a, page 9.

F-25 flashes if the inlet thermistor is shorted.
This fault code will ONLY appear when in the
diagnostic test mode. See TEST #4a, page 9.

F-26 flashes if there is a motor drive system
failure. See TEST #3a, page 7.

F-28 flashes if the moisture sensor strip is open.
This fault code will ONLY appear when in the
diagnostic test mode. See TEST #5, page 10.

F-29 flashes if the moisture sensor strip has
shorted. This fault code will ONLY appear when in
the diagnostic test mode. See TEST #5, page 10.

F-30 flashes if a restricted airflow condition
exists. This fault code will ONLY appear when in
the diagnostic test mode. Check to make sure the
lint screen is clean, the door seal is in place and
the vent is not obstructed.

F-40 flashes if the communication between the
machine control and motor control is lost. See
TEST #3b, page 8.

F-41 flashes when there is a blower motor failure.
See TEST #3b, page 8.

F-42 flashes if the motor control detects a voltage
less than 90 VAC. See TEST #1, page 6 and
DIAGNOSTIC: Displaying Line Voltage, page 2.

F-43 flashes if the motor control detects a low
voltage condition. The dryer will continue to run at
a set blower speed. See TEST #1, page 6 and
DIAGNOSTIC: Displaying Line Voltage, page 2.

F-44 flashes when there is a motor control
electronics failure. See TEST #3b, page 8.

F-45 flashes when there is a motor control
electronics speed sensor failure. See TEST #3b,
page 8.

F-46 flashes if the motor control detects an
over-current or an over-torque condition. See
TEST #3b, page 8.

PF

AF

F-01

F-02

F-22

F-23

F-24

F-25

F-26

F-28

F-29

F-30

f-40

f-41

f-42

f-43

f-44

f-45

f-46

Power
Failure

Restricted

Airflow

Condition

Primary

Control

Failure

Keypad/

User Interface

Failure

Exhaust

Thermistor

Open

Exhaust

Thermistor

Shorted

Inlet

Thermistor

Open

Inlet

Thermistor

Shorted

Motor Drive

System Failure

Moisture

Sensor Open

Moisture

Sensor

Shorted

Restricted

Airflow

Condition

Communication

Error

Blower Motor

Failure

Undervoltage

Failure

Undervoltage

Warning

Motor Control

Failure

Motor Control

Speed Sensor

Error

Blower Motor

Error

TROUBLESHOOTING GUIDE

Some tests will require accessing components. See figure 2, page 6 for
component locations.

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.)

WON’T START CYCLE
WHEN START BUTTON
IS PRESSED.

WON’T SHUT OFF
WHEN EXPECTED.

CONTROL WON’T
ACCEPT SELECTIONS.

WON’T HEAT.

HEATS IN AIR CYCLE.

SHUTS OFF BEFORE
CLOTHES ARE DRY.

1. Supply connections. See TEST #1, page 6.

2. Check harness connections.

3. User interface assembly. See TEST #6, page 10.

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 #3a, page 7.

3. See TEST #7, page 10.

1. Check STOP button. See TEST #6, page 10.

2. User interface assembly. See TEST #6, page 10.

3. Moisture sensor. See TEST #5, page 10.

User interface assembly. See TEST #6, page 10.

1. Heater. See TEST #4, page 8.

2. Check harness connections.

3. Check installation.

Heater. See TEST #4, page 8.

1. Check the dryness setting for auto cycles.

2. Check for full lint screen.

3. Check for clogged vent.

4. Moisture sensor. See TEST #5, page 10.

5. Dryness level adjust. See Adjusting
Customer-Focused Drying Modes, page 11.

PLUGGABLE DRIVE MOTOR SWITCH

Blue-White

Blue

Black-White

Red

Green-Yellow

Red

CENTRIFUGAL SWITCH (MOTOR)

Contacts

Function

Start

Run

1M 2M 3M 5M 6M

=

Contacts closed

FOR SERVICE TECHNICIAN’S USE ONLY PART NO. W10035270

TECH SHEET - DO NOT DISCARD PAGE 4

ELECTRIC DRYER WIRING DIAGRAMS

SINGLE ELEMENT MODEL

L1 LINE – BK

BK

DRUM LAMP

BK

USER INTERFACE

BK

BR

VDD P1-8

DATA IN P1-7

VSS P1-6

STROBE P1-5

DATA OUT P1-4

CLOCK P1-3

BUZZER P1-2

+/- 12 VDC P1-1

R

P8-1

P9-2

N.O.

COM

LAMP LOAD

L1

P5-1 VDD
P5-2 DATA IN
P5-3 VSS
P5-4 STROBE
P5-5 DATA OUT
P5-6 CLOCK
P5-7 BUZZER
P5-8 +/- 12 VDC

P2-1 VDD
P2-2 DATA
P2-3 VSS

HEATER

RELAY 1

MACHINE
CONTROL

ELECTRONICS

NEUTRAL

DOOR

GND

MOTOR

MTR CS

MOIST.

MOIST RTN

MODEL

MODEL RTN

OUTLET TEMP.

OUTLET

TEMP RTN

INLET TEMP.

INLET

TEMP RTN

P8-3 NEUTRAL

P8-4

P8-2

P9-1

P8-5

P13-1

P13-2

P4-4
P4-5

P4-3

P4-6

P4-2

P4-1

240 VOLTS

120 VOLTS

T

G-Y

BU

BK-W

Y-R

G-Y

Y-R

EXHAUST THERMISTOR

R

R

INLET THERMISTOR

R

R

R

W

THERMAL FUSE

196°F 91°C()

SENSOR

MOVS

10k Ω

50k Ω

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

R – LINE L2

Y-R

BK

W – NEUTRAL N

BU

SENSOR

THERMAL

CUT-OFF

352°F (178°C)

4M

SWITCH

BELT

BU

NC

W

1.4–2.6 Ω

1.4–2.8 Ω

DRIVE MOTOR

1/3 H.P.

BK

NO

MAIN

START

DOOR

SWITCH

3M

HIGH LIMIT

THERMOSTAT

295°F (146°C)

W

5M

6M

NC

CENTRIFUGAL SWITCH

R-W

NEUTRAL
TERMINAL
LINKED TO
CABINET

W

HEATER
5400 W

R

2M

1M

R

G-Y

DUAL ELEMENT MODEL

L1 LINE – BK

BK

BK

USER INTERFACE

BK

THERMAL

CUT-OFF

352°F (178°C)

R-W

HIGH LIMIT

THERMOSTAT

295°F (146°C)

DRUM LAMP

NC

BR

VDD P1-8

DATA IN P1-7

VSS P1-6

STROBE P1-5

DATA OUT P1-4

CLOCK P1-3

BUZZER P1-2

+/- 12 VDC P1-1

BK

BK

R

N.O.

P8-1

P9-2

N.O.

N.O.

COM

COM

BLOWER
MOTOR

PHASE 3

PHASE 2

PHASE 1

LAMP LOAD

L1

P5-1 VDD
P5-2 DATA IN
P5-3 VSS
P5-4 STROBE
P5-5 DATA OUT
P5-6 CLOCK
P5-7 BUZZER
P5-8 +/- 12 VDC

P2-1 VDD
P2-2 DATA
P2-3 VSS

HEATER

RELAY 1

HEATER

RELAY 2

MACHINE
CONTROL

ELECTRONICS

P3

P2

P1

GY

MC2-1

OR

MC2-3

MC2-5

PK

WIDE

NEUTRAL

DOOR

MOTOR

MTR CS

MOIST.

MOIST RTN

MODEL

MODEL RTN

OUTLET TEMP.

OUTLET

TEMP RTN

INLET TEMP.

INLET

TEMP RTN

VDD

DATA

VSS

GND

240 VOLTS

120 VOLTS

PHASE 3
N.C.
PHASE 2
N.C.
PHASE 1

P2-1
P2-2
P2-3

P8-3 NEUTRAL

P8-4

P8-2

P9-1

BU

P8-5

BK-W

P13-1

P13-2

P4-4
P4-5

R

P4-3

R

P4-6

R

P4-2

R

P4-1

MOTOR

CONTROL

ELECTRONICS

VCC

DATA

VSS

MC3-3

MC3-1

MC3-2

W

T

G-Y

THERMAL FUSE

196°F 91°C()

Y-R

SENSOR

MOVS

G-Y

Y-R

EXHAUST THERMISTOR

10k Ω

INLET THERMISTOR

50k Ω

NEUTRAL

BU

Y-R

BK

W – NEUTRAL N

MC1-3

MC1-1

N.C.
N.C.

MC1-2

L1

MC1-4

BK

BU

SENSOR

4M

SWITCH

W

BELT

BU

DUAL MOTOR

MODEL

NC

NO

W

MAIN

1.4–2.6 Ω

START

1.4–2.8 Ω

DRIVE MOTOR

1/3 H.P.

DOOR

SWITCH

R – LINE L2

NEUTRAL
TERMINAL
LINKED TO

W

5M

CENTRIFUGAL SWITCH

3M

6M

HEATER
2700 W

V

R

HEATER
2700 W

CABINET

R

R

W

2M

G-Y

1M

FOR SERVICE TECHNICIAN’S USE ONLY PART NO. W10035270