Whirlpool WGD6400SW0 Tech Sheet - Page 7

Browse online or download pdf Tech Sheet for Dryer Whirlpool WGD6400SW0. Whirlpool WGD6400SW0 12 pages. 29" gas dryer
Also for Whirlpool WGD6400SW0: Parts List (8 pages), Quick Start Manual (6 pages)

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TECH SHEET - DO NOT DISCARD

Drive Motor

Switch

White

Connector

Figure 7. Remove white connector.

Main Winding:

Blue Wire in Back and Bare

Copper Wire (5 Position)

Start Winding:

Blue Wire in Back and Bare

Copper Wire (3 Position)

Figure 8. Main and start winding

measure points.

6. Using figure 8, check for the resistance

values of the motor's Main and Start

winding coils as shown in the following

table.

NOTE: Main and Start winding coils

must be checked at the motor.

WINDING

RESISTANCE

CONTACT POINTS

Ω

OF MEASUREMENT

Blue wire in back

at pin 4 and bare

MAIN

1.4–2.6

copper wire on pin 5

of black drive motor

Blue wire in back

at pin 4 and bare

START

1.4–2.8

copper wire on pin 3

of black drive motor

FOR SERVICE TECHNICIAN'S USE ONLY

If the resistance at the motor is

correct, there is an open circuit

between the motor and machine

control electronics. Check for failed

belt switch.

If the Start winding resistance is

much greater than 4 ohms, replace

the motor.

7. Check the belt switch by measuring

resistance between the two blue wires

as shown in figure 9, while pushing up

the belt switch tension pulley.

Blue Wires

(Back and 4 Position)

Figure 9. Checking the belt switch.

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.

8. Door switch problems can be

uncovered in the Door Switch

Diagnostic Test, page 1; however, if this

was not done, the following can be

done without applying power to the

dryer. Connect an ohmmeter across

P8-3 (neutral, white wire) and P8-4

(door, tan wire).

With the door properly closed, the

ohmmeter should indicate a closed

circuit (0–2 ohms).

If not, replace the door switch

assembly. See figure 12, page 10;

and Removing the Front Panel/Drum

Assembly, page 10.

switch

TEST #4 Heater

This test is performed when either of the

following situations occur:

Dryer does not heat

Heat will not shut off

This test checks the components making

up the heating circuit. The following items

are part of this system:

–

Harness/

connection

–

Heater relay

–

High limit

thermostat

Belt Switch

–

Thermal cut-off

Tension Pulley

Thermal fuse

–

Gas burner

assembly

Dryer does not heat:

Locate the components using figure 2,

page 5; and figure 10.

Drum

Light

Lint

Duct

Harness

Connection

4 Duct

Screws

Exhaust

Thermistor

Figure 10. Thermal components,

viewed from rear.

1. Unplug dryer or disconnect power.

2. Remove the back panel to access the

thermal components. See Removing

the Back Panel, page 11.

3. Perform TEST #4b, page 9. If the

thermal fuse is OK, go to step 4.

4. Perform TEST #4c, page 9. If the

thermal cut-off is OK, go to step 5.

5. 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

terminals.

PAGE 7

–

Centrifugal switch

Exhaust thermistor

–

Machine control

–

electronics. See

ESD information,

page 1.

Gas supply

–

High Limit

Thermostat

Sensor

Wires

Thermal

Cut-Off (TCO)

Thermal

Fuse

PART NO. W10054160