tech-sheet-3976796
TECH SHEET – DO NOT DISCARD PAGE 1

Electrical Shock Hazard Disconnect power before servicing. Replace all panels before operating. Failure to do so could result in death or electrical shock.

IMPORTANT

Electrostatic Discharge (ESD) Sensitive Electronics

Do not open package until it is time to install the electronic board.

ESD problems are present everywhere. ESD may damage or weaken the electronic board. The new board may appear to work well after repair is finished, but failure may occur at a later date due to ESD stress.

s 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.

s Before removing the part from its package, touch the anti-static bag to a green ground connection point or unpainted metal in the appliance.

s Avoid touching electronic parts or terminal contacts; handle electronic board by edges only.

s When repackaging failed electronic board in anti-static bag, observe above precautions.

AUTO DRY PLUS FABRIC WRINKLE GUARD SIGNAL PUSH TO START with TEMPERATURE III ELECTRONIC MOISTURE SENSING

NORMAL DRY MORE DRY

DAMP DRY KNIT END OF CYCLE SOFT LOW

OFF EXTRA DELICATE NORMAL OFF ON HAND WASHABLES PERM PRESS WRINKLE GUARD III WRINKLE GUARD III OFF LOUD EXTRA LOW MEDIUM

OFF AIR FLUFF COTTON NO HEAT HIGH

10 80 TOUCH UP TIMED DRY 20 70 30 40 60 50

Exclusive EVENHEAT Drying System Heavy Duty Super Capacity Plus Quiet Pak Plus Kenmore 90 Plus Series

FOR SERVICE TECHNICIAN’S USE ONLY PART NO. 3976796

PAGE 2 TECH SHEET – DO NOT DISCARD

Electric Dryer Wiring Diagram IMPORTANT: Electrostatic (static electricity) discharge may cause damage to electronic con- trol assemblies. See page 1 for details.

L1 LINE – BLACK RED – LINE L2

240 VOLTS

120 VOLTS WHITE – NEUTRAL N NEUTRAL TERMINAL DRUM LAMP LINKED TO CABINET BLACK DL BROWN

D2

TIMER EVEN HEAT CONTROL D1 WHITE

BK BLACK PT-1 TIMER DOOR P2-6 BLUE D G

DOOR

SWITCH

BU P1-1 MTR MOIST P2-5 G/Y GND

V P1-2 T2 SENSOR

MOIST. P2-4 Y/R G/Y

R P1-3 T3

TEMP. P2-3 RED WHITE/RED

W P1-4 T4 MODEL THERMISTOR

BU NEUTRAL P2-1 W

BLUE WRINKLE WHITE

GRAY GUARD 5M 2M P3-8 RED COM HEATER 1 4 MAIN CENTRIFUGAL SWITCH RELAY TAN 2.4-3.6 RED R/W WGUARD P3-7 BLUE BLUE 4M BLK HEATER VIO START P3-6 FABRIC BELT 2.4-3.8 PTS P3-1 HI 3 SWITCH P3-5 NO R/W FS-1 ORG THERMAL FUSE 196 °F T/W HEATER P3-4 2 4 3M 6M 1M

P3-2 LOW FS-2 DRIVE MOTOR FS-3 BU PK/BK 1 5

NO MOTOR SIGNAL RELAY

COM P2-7 MOTOR LOUD 2 4 START

BU PK/BK START SOFT P3-3 1 NC BLK SENSE HI LIMIT P1-5 W/BK

BU/BK RED BLACK RED/WHITE RED

BLUE THERMAL CUT-OFF THERMOSTAT HEATER (TCO) 250°F 7.8-11.8 RED 275°F

Centrifugal CONTACTS Drum Size: Drum Speed: Switch FUNCTION 1M 2M 3M 5M 6M 7.0 cubic feet 48 ± 3 RPM CCW (Motor) START

RUN BLUE VIOLET WHITE GREEN/ = CONTACTS CLOSED

BLACK YELLOW

BU RED RED PK/BK

PK/BK

BU Pluggable Drive Motor Switch Motor Relay

V

RED B W R/W U

R/W B B K K RED 3976594 R Heater Relay Even Heat Electronic Timer Control Assembly FOR SERVICE TECHNICIAN’S USE ONLY PART NO. 3976796

TECH SHEET – DO NOT DISCARD PAGE 3

Component Location

L.H. 3390646 (2) Control 3388228 (2) Heater 3398893 Rear Panel Signal Push To Start R.H. Heater Relay Relay Control Bracket (PTS) End Cap End Cap Timer Screw Bracket Ground Switch Screws Ground Wire Timer Relay or Switch

R

KB B K

W B U

V

Trim 3390646 (2) Console Even Heat Fabric/Temp Wrinkle 3398893 3390646 3388228 (2) Motor Trim Relay R.H. L.H. End Cap Panel Control Switch Guard Console Panel Ground Screw Motor Relay End Cap

End Cap Screws Asm Switch Ground Wire (2 Req’d) Screws

PART NUMBER Damp Dry Test

MODEL NOS. MODEL NOS. Begin with an empty dryer and clean lint screen.

COMPONENT 68932791 68934791 1. Set the following configuration: s Timer – DAMP DRY 68942891 68944891 s Fabric/Temperature switch – COTTON HIGH s Wrinkle Guard switch – OFF 68972891 68974891 s Signal switch – LOUD s Door – must be closed (White) (Almond) 2. Press the PUSH TO START switch. After approxi- Console Panel (Basic) mately 16 seconds, the Timer will start to advance to the OFF position, and the “End of Cycle” signal for White Models: 68932791 3406530 – will sound. If one or more of these functions do not occur, proceed to the Factory Test. 68942891 3976549 – Factory Test 68972891 3977004 – The Factory Test allows factory/service personnel to for Almond Models: 68934791 – 3406531 test and verify all inputs to the Even Heat Control. The 3976550 basic operation of this test is to notify the operator with 68944891 – 3977005 an audible beep every time the status of an input to the control changes state. 68974891 – Activating the Test Mode End Cap – R. H. 3949274 3949275 1. Set the following configuration: End Cap Trim – R. H. 3951009 3951010 s Door – must be open s Fabric/Temperature switch – AIR FLUFF End Cap – L. H. 3949280 3949281 s Signal switch – LOUD s Timer – TIMED DRY or AUTO DRY PLUS selection End Cap Trim – L. H. 3951013 3951014 2. Turn the Wrinkle Guard switch from OFF to ON P.T.S. Switch 3395382 3395382 three times within a five second period. A single beep will sound to indicate that the factory test P.T.S. Knob * 3402566 3402568 mode is activated.

Control Knob * 3402572 (3) 3402574 (3) NOTE: If any of these initial conditions are not sat- isfied, the control will not enter the test mode. Signal Switch 3405151 3405151

Wrinkle Guard Switch 3405152 3405152

Fabric/Temperature Switch 3399643 3399643

Motor Relay 3405281 3405281

Heater Relay 3405281 3405281

Even Heat Control Assembly 3976594 3976594

Timer Knob * 3402594 3402596

Console Harness * 3976590 3976590

Main Harness * 3976591 3976591

Door Switch * 3392266 3392266

Thermal Cut-Off * 3398671 3398671

Thermal Fuse * 3390719 3390719

Heat Element Assembly * 3392661 3392661

Hi-Limit Thermostat * 3390291 3390291

Drive Motor * 3395654 3395654

Thermistor – NTC 10K Ohms * 3406294 3406294

Timer for Models: 3976586 68932791, 68934791

68942891, 68944891, 68972891, 68974891 3976585

* not shown

FOR SERVICE TECHNICIAN’S USE ONLY PART NO. 3976796

PAGE 4 TECH SHEET – DO NOT DISCARD

Test Mode Functionality Fabric/Temperature Switch Test

When the control is in the Factory Test mode, every Remove the wires from Orange Violet Tan input change of state will result in a beep (with the the switch to complete exception of the Signal switch). This includes: this test. 1 23

s Door switch Reference contact 4 5 s Moisture Sensor (short/open Sensor will result in continuity to Pin 4 (White). White FABRIC a beep) NOTE: A moistened finger or damp cloth may also be used. Fabric Switch Table s Fabric/Temperature switch s Wrinkle Guard switch SWITCH CONTACTS FUNCTION s Push To Start (PTS) switch (with the door switch POSITION 321 closed) s Timer (any cam input change will result in a 9 O’clock OOO AIR FLUFF beep) NOTE: Timer will advance during test. 10 O’clock OOX DELICATE If any of the inputs do not result in a beep, proceed to the following component tests. 12 O’clock OXO KNITS

2 O’clock OXX PERM PRESS

3 O’clock XOO COTTON

O = OPEN X = CLOSED

Timer Test Wrinkle Guard Switch (On/Off) Test

Perform the Factory Test to determine that the timer Remove the wires from Gray motor advances (should run continuously). the switch to complete 1 this test. 4 To determine if the Even Heat Control Board is sending the required pulse sequences to the timer motor: Reference contact White WRINKLE continuity to Pin 4 GUARD 1. Set the Volt/Ohmmeter to read up to 120VAC. (White).

2. Place the probes at PT01 and P1-1 on the Even Wrinkle Guard Switch Table Heat Control Board. V SWITCH POSITION CONTACTS FUNCTION 3. Operate the dryer in the TIMED DRY cycle. Meter should read ON Eleven O’clock Open Wrinkle Guard Off 7 sec., OFF 113 One O’clock Closed Wrinkle Guard On sec. B W Remove the wires U from timer termi- nals to complete “End of Cycle” Signal Switch Test this test. B B K Remove the wires from Tan/White Reference K the switch to complete White/Black contact continuity this test. to Timer – BK. 12

R

Timer Encoding Table Reference contact White 4 continuity to Pin 4 SIGNAL (White).

TIMED DRY MODE

TIMER CONTACTS TIMED DRY COOL DOWN WRINKLE GUARD OFF Signal Switch Table

W to BK O O O O CONTACTS

R to BK X X O O SWITCH FUNCTION POSITION V to BK O X X O 1 2 Ten O’clock BU to BK X X X O Twelve O’clock OO OFF

Two O’clock X O SOFT End of Cycle Signal

AUTO DRY PLUS MODE O X LOUD End of Cycle Signal

TIMER CONTACTS MORE NORMAL DAMP WRINKLE OFF O=OPEN X=CLOSED DRY DRY DRY GUARD

W to BK X X O O O

R to BK O O O O O Heater Box High-Limit Thermostat Test V to BK X O O X O Remove the thermistor from the fan housing and plug BU to BK X X X X O the hole. Protect the thermistor and leads from ground- ing against any metal parts. See Figure 1. Completely O = OPEN X = CLOSED

PART NO. 3976796 FOR SERVICE TECHNICIAN’S USE ONLY

TECH SHEET – DO NOT DISCARD PAGE 5

Thermal Heater 2. Press the Push To Start switch. Cut-Off Element a. If you hear three short beeps and the dryer shuts High Limit off after several seconds, the thermistor is either Thermostat shorted or open and must be replaced. To re- place the thermistor, unplug the dryer and re- move the front toe panel. Remove the two wires and replace the thermistor as shown in Figure 1.

b. If the dryer appears to operate correctly, pro- ceed to step 3.

3. Remove exhaust vent and start the dryer.

a. Turn Fabric/Temperature switch to desired tem- perature to be tested, and select 20 minutes on the Timed Dry dial. Hold a glass bulb thermometer capable of reading from 90°F to 180°F in the cen- ter of the exhaust outlet. Measure exhaust tem- peratures with heater off and on. The correct exhaust temperatures are as follows:

Thermal FABRIC/TEMP. HEAT TURNS HEAT TURNS Fuse SWITCH SETTING OFF ON Thermistor COTTON HIGH 150°±10°F 10° – 15°F Figure 1 below heat off

block the exhaust outlet. Turn dryer on and allow the NORMAL PERM 140°±10°F 10° – 15°F high-limit thermostat to cycle once, then measure the PRESS MEDIUM below heat off time elapsed until the high-limit thermostat trips. It should trip between 21 and 38 seconds. KNIT LOW 125°±10°F 10° – 15°F IMPORTANT: Be sure to reinstall the thermistor after below heat off testing thermostat. EXTRA DELICATE 115°±10°F 10° – 15°F Thermal Fuse Test below heat off EXTRA LOW A thermal fuse is used on this model. The thermal fuse is wired in series with dryer drive motor. If the thermal b. If the exhaust temperature is not within the fuse opens, power is shut off to the motor. (Centrifugal specified limits, check the resistance of the ther- switch in motor also opens heater circuit.) mistor. Once the thermal fuse has opened, it must be re- placed. Check for failed thermistor or other cause of THERMISTOR THERMISTOR failure. Replace failed parts. Refer to Figure 1. RESISTANCE RESISTANCE

Thermistor Test TEMP. ° F RES. K TEMP. ° F RES. K

An electronic temperature sensor called a thermistor 50° 19.9 100° 5.7 is used in this model in place of an operating thermo- stat. The Even Heat Control monitors the exhaust tem- 60° 15.3 110° 4.7 perature using the thermistor and cycles the heater relay on and off to maintain the desired temperature. 70° 11.9 120° 3.7 Procedure Begin with an empty dryer and a clean lint screen. 80° 9.2 130° 3.1

1. Set the following configuration: 90° 7.4 140° 2.5 s Timer Dial – TOUCH UP s Fabric/Temperature switch – COTTON HIGH c. If the thermistor resistance checks within nor- s Wrinkle Guard switch – OFF mal limits, replace the Even Heat Control. s Signal switch – LOUD s Door – must be closed Thermal Cut-Off

This unit is equipped with a “one-shot” thermal cut-off. See Figure 1. If the dryer does not heat and there are 240 Volts to the dryer, disconnect the dryer from its electrical source and check thermal cut-off for continu- ity. If continuity is open, thermal cut-off has failed and must be replaced.

NOTE: If the heater box thermal cut-off has failed, re- place the cut-off and high-limit thermostat. In addition, check for defective heater element, blocked or im- proper exhaust system.

FOR SERVICE TECHNICIAN’S USE ONLY PART NO. 3976796

PAGE 6 TECH SHEET – DO NOT DISCARD

PROBLEM: Dryer Will Not Run 7. Press and hold the PUSH TO START switch. If motor does not start, replace motor. (Refer to Motor Strip Circuit, page 8)

If the motor will not start, check the following: PROBLEM: Dryer Will Not Heat

– LINE VOLTAGE – BELT/BELT SWITCH (Refer to Heater Strip Circuit, page 8) – HARNESS/CONNECTION – MOTOR – MOTOR RELAY – DOOR SWITCH If the heat will not turn on, check the following: – PUSH TO START SWITCH – EVEN HEAT CONTROL – THERMAL FUSE – LINE VOLTAGE (240V) – HEATER – HARNESS/CONNECTION – CENTRIFUGAL SWITCH IMPORTANT: Electrostatic (static electricity) – HEAT RELAY – THERMISTOR discharge may cause damage to electronic con- – THERMAL CUT-OFF – EVEN HEAT CONTROL trol assemblies. See page 1 for details. – HI LIMIT THERMOSTAT

Procedure: IMPORTANT: Electrostatic (static electricity) discharge may cause damage to electronic 1. Set the following configuration: control assemblies. See page 1 for details. s Door – must be closed s Timer – TIMED DRY Procedure: s Fabric/Temperature switch – AIR FLUFF 1. Set the following configuration: 2. Check the voltage at the Timer (reference Neutral): s Door – must be closed s Fabric/Temperature switch – COTTON a. At Timer BK voltage should be 120VAC. If not, s Timer – TIMED DRY check the input voltage line (L1). 2. Press the PUSH TO START switch. The dryer will start, b. If voltage is okay at BK, check Timer voltage at and the heater will take several seconds to turn on. BU. If voltage is not 120VAC, replace Timer. 3. Check the voltage at the Heater Relay: 3. Check for 120VAC at the PTS switch and Motor s P3-1 to P3-2 should be 48VDC Relay. 120VAC (reference Neutral) should be pre- s COM to NO should be ~0VAC sent at: s one side of the PTS switch a. If the voltage is 48VDC at the P3-1 to P3-2 s one side of the Motor Relay contacts (large terminals, and ~240VAC at the COM and NO terminals) terminals, replace the Relay.

If 120VAC is not present at these locations, check b. If the voltage is 0VDC at the P3-1 to P3-2 termi- the harness connections. If harness connections nals, replace the thermistor. are good, go to Step 4. c. If, after replacing the thermistor, the voltage is 4. Press and hold the PUSH TO START switch. still 0VDC at the P3-1 to P3-2 terminals, replace the Even Heat Control. a. Check the voltage at the PTS switch. If 120VAC is not present at both terminals, replace PTS PROBLEM: Dryer Heats During Air switch. Fluff/No Heat Cycle

b. Check the voltage at the Motor Relay: Both sides (Refer to Heater Strip Circuit, page 8) of the Motor Relay contacts (large terminals) should be 120VAC with reference to Neutral. If the dryer heats when the Fabric/Temperature switch

If 120VAC is not present at one of the Motor is set to AIR FLUFF (No Heat), check the following: Relay contacts, then check for 48VDC from P2-7 to P3-2. If 48VDC is correctly shown, re- – HARNESS/CONNECTION – EVEN HEAT CONTROL place the Motor Relay. If not 48VDC, then re- – HEAT RELAY place the Even Heat Control. IMPORTANT: Electrostatic (static electricity) 5. If the motor does not start, check the Door switch (D to D1). There should be continuity when door is discharge may cause damage to electronic closed. If not, replace the Door switch. control assemblies. See page 1 for details.

6. Press the PUSH TO START switch. If the motor Procedure: starts but does not continue to run, replace the Even Heat Control. 1. Set the following configuration: s Door – must be closed s Fabric/Temperature switch – AIR FLUFF s Timer – TIMED DRY

PART NO. 3976796 FOR SERVICE TECHNICIAN’S USE ONLY

TECH SHEET – DO NOT DISCARD PAGE 7

2. Press the PUSH TO START switch. PROBLEM: Dryer Shuts Off Before a. Check voltage on Heater Relay. If P3-1 to P3-2 Clothes Are Dry is 0VDC, replace the Heater Relay. b. If P3-1 to P3-2 is 48VDC, replace the Even Heat (Refer to Thermistor Test, page 5, and Control. Moisture Sensor Strip Circuit, page 8) If the dryer shuts off too soon when set to the AUTO DRY PROBLEM: Dryer Won’t Shut Off PLUS cycle, check the following:

(Refer to Motor and Moisture Sensor Strip Circuits, – HARNESS/CONNECTION page 8) – MOISTURE SENSOR If the dryer will not shut off, check the following: – EVEN HEAT CONTROL – THERMISTOR – PUSH TO START (PTS) SWITCH – HARNESS/CONNECTION IMPORTANT: Electrostatic (static electricity) – MOTOR RELAY – MOISTURE SENSOR discharge may cause damage to electronic – EVEN HEAT CONTROL control assemblies. See page 1 for details.

IMPORTANT: Electrostatic (static electricity) Procedure:

discharge may cause damage to electronic 1. Test the Moisture Sensor by following the proce- control assemblies. See page 1 for details. dure outlined in “Factory Test”, beginning on page 3. s If Moisture Sensor fails the “Factory Test” (does Procedure: not produce a beep sound), replace Moisture Sensor. 1. Set the Timer to OFF. If the dryer starts running as soon as it is plugged in, replace the Timer. 2. If Factory Test is passed, verify thermistor by per- forming the test procedures outlined in “Thermistor 2. Set the following configuration: Test”. s Dryer – power cord plugged in s Door – must be closed 3. If problem persists after replacing Moisture Sensor s Fabric/Temperature switch – COTTON and thermistor, replace the Even Heat Control. s Timer – TIMED DRY for less than 10 minutes PROBLEM: Timer Continuously 3. If the dryer starts running before the PUSH TO Advances START switch is pressed, replace the PTS switch. (Refer to Timer Drawing, page 2, and 4. If, after replacing the PTS switch, the dryer still Motor Strip Circuit, page 8) starts before the PUSH TO START switch is pressed, If the dryer continues to advance past the OFF posi- replace the Motor Relay. tion, check the following:

5. If the dryer does not stop after the set time elapses, – HARNESS/CONNECTION check the Motor Relay. – TIMER a. If the voltage is 0VAC at COM to NO, replace the Motor Relay. IMPORTANT: Electrostatic (static electricity) b. If the voltage is 120VAC at COM to NO, re- place the Even Heat Control. discharge may cause damage to electronic con- trol assemblies. See page 1 for details. 6. If the dryer will not terminate its cycle when set to AUTO DRY PLUS, check the Moisture Sensor. Procedure: a. If there is continuity to Ground for Y/R with no load, look for a short in the Sensor or Y/R wire. 1. Verify the Blue wire and the Black L1 wires are in Replace Sensor if shorted. the correct positions: The Black wire goes next to b. If the Sensor and Y/R are good, replace the the Red wire, and the Blue wire is located on the Even Heat Control. three terminals that are close to each other.

2. Test the Timer by following the procedure outlined in “Factory Test”, beginning on page 3.

3. If the Timer continues to advance past OFF, then replace the Timer.

FOR SERVICE TECHNICIAN’S USE ONLY PART NO. 3976796

PAGE 8 TECH SHEET – DO NOT DISCARD

MOTOR STRIP CIRCUIT RED – LINE L2

L1 LINE – BLACK

240 VOLTS WHITE – NEUTRAL N 120 VOLTS BLUE NEUTRAL

TERMINAL

TIMER EVEN HEAT CONTROL D2 LINKED TO

D1 WHITE CABINET

BK BLACK PT-1 P2-6 D DOOR G TIMER DOOR

SWITCH

BU P1-1 MTR

BU P3-2 HEATER LOW BLUE BLK PK/BK

BU 5M 2M

NO MOTOR RELAY

P2-7 MOTOR MAIN CENTRIFUGAL SWITCH PK/BK START 2.4-3.6 PTS COM BLUE BLUE 4M P1-5 START START BU SENSE THERMAL FUSE BELT 2.4-3.8 196 °F SWITCH BLK BU/BK

3M 6M 1M

BLUE DRIVE MOTOR

HEATER STRIP CIRCUIT RED – LINE L2

L1 LINE – BLACK NEUTRAL TERMINAL EVEN HEAT CONTROL 240 VOLTS WHITE – NEUTRAL N LINKED TO 120 VOLTS WHITE/RED CABINET

TEMP. P2-3 RED THERMISTOR

NEUTRAL P2-1 W

5M 2M

CENTRIFUGAL SWITCH

RED HEATER HEATER 3M 6M 1M RELAY HI COM P3-1 NC RED/WHITE R/W HEATER NO P3-2 LOW HI LIMIT R/W THERMOSTAT

RED BLACK 250°F RED

THERMAL CUT-OFF HEATER (TCO) 7.8-11.8 275 °F

MOISTURE SENSOR STRIP CIRCUIT

L1 LINE – BLACK

120 VOLTS WHITE – NEUTRAL N NEUTRAL TERMINAL TIMER LINKED TO CABINET

EVEN HEAT CONTROL

BK BLACK PT-1

TIMER

BU P1-1 MOIST P2-5 G/Y MTR GND P2-4 Y/R

MOIST. SENSOR G/Y

BU NEUTRAL P2-1 W WHITE/RED

PART NO. 3976796

NOTE: This sheet contains important Technical Service Data

FOR SERVICE TECHNICIAN ONLY DO NOT REMOVE OR DESTROY

PART NO. 3976796 FOR SERVICE TECHNICIAN’S USE ONLY