Whirlpool MED / GD 9700S, MED / GD 9600S manual Test #2 Motor Circuit Test

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:

•Harness/connection

•Thermal fuse (electric dryers only)

•Belt/belt switch

•Drive motor

•Door switch

•Electronic control board

1.Unplug dryer or disconnect power.

2.Access the electronic control board and measure the resistance across P1-3 and P1-4.

•If resistance across P1-3 and P1-4 is in the range of 1 to 6 ohms, replace the electronic control board.

•Otherwise, go to step 3.

3.Check the wiring and components in the path between these measurement points (refer to the Wiring Diagrams in Section 7).

4.Electric Dryers Only: Check the thermal fuse (see TEST #3b on page 6-9).

5.Check the belt switch and drive motor.

Belt Switch Pulley

Drum Belt

6.Remove the white connector from the drive motor switch.

Drive Motor Switch

White Connector

7.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.

W inding	R e s i s t a nc e	Tes t Points
MA IN	2.4 - 3.6	Blue wire in
	ohms	back &
S T AR T	2.4 - 3.8	Blue wire in
	ohms	back & violet

Main Winding: Blue Wire In Back And White/Orange Wire

Start Winding: Blue Wire In Back And Violet Wire

•If the resistance at the motor is correct, there is an open circuit between the motor and electronic control board. Check for a failed belt switch.

8.Check the belt switch by measuring resis- tance between the two blue wires, while pushing up on the belt switch pulley.

Blue Wires

Belt Switch

Belt Switch Pulley

•If the resistance reading goes from in- finity to a few ohms as pulley arm closes the switch, belt switch is okay. If not, replace the belt switch.

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