Diagnostic Tests - Whirlpool LHW0050PQ Service Manual

DIAGNOSTIC TESTS

TEST # PROCEDURE
The electronic control automatically tests the operation of
the thermistor, the pressure switch OFF condition (no
1
water in tub), the program selector, and the door lock
switch.
- START position. The top LED is deactivated.
This procedure tests the operation of the cold water
solenoid valve and the pressure switch. The top two LEDs
are deactivated.
- The tub fills with water through the cold solenoid
2
valve until the pressure switch trips.
- Both detergent dispenser wax motors are OFF (water
enters the pre wash detergent dispenser).
This procedure tests the operation of the heating element,
the wash motor, and the wash detergent dispenser wax
motor. The top three LEDs are deactivated.
- The heating element is activated (only with water).
3
- The motor rotates alternately in both directions (45
revolutions clockwise, pause, and the same number of
revolutions counterclockwise).
- The wash detergent dispenser wax motor is ON and
water enters the wash compartment.
This procedure tests the operation of the drain pump, spin
motor, and the rinse detergent dispenser wax motor. The
top four LEDs are deactivated.
4
- The drain pump is activated, and spin runs at the pre-
set speed.
- The rinse detergent dispenser wax motor is ON, and
water enters the softener compartment.
This procedure tests the operation of the hot water sole-
noid valve, and the wash motor. All five LEDs are deacti-
vated.
5 - The tub fills with ten inches of hot water.
- The wash motor rotates at different rpms and directions.
- Both detergent dispenser wax motors are ON, and
water enters the softener dispenser.
This procedure tests the following components:
- The drying solenoid valve.
6 - The drying fan motor.
- The drying heater element.
6-3
PROGRAM KNOB
LEDS ON
POSITION
6 O'Clock
Position
Prewash
Wash
Rinse
Spin
Done
1
Prewash
Wash
Rinse
Spin
Done
Prewash
Wash
Rinse
Spin
Done
Prewash
Wash
Rinse
Spin
Done
Prewash
Wash
Rinse
Spin
Done
Prewash
Wash
Rinse
Spin
Done
2
3
4
5
6