Whirlpool LHW0050PQ Service Manual page 55

PROBLEM TEST
Place the control unit in the test mode (see page 6-2), and
perform Test 2 to allow water to enter the tub (this is re-
quired for the heating element to function).
With water in the tub, perform Test 3. Wait until the LEDs
switch on, and then test the heating element:
The washer
- Use a tester to check the continuity between the two
does not
contacts of the heating element, if the circuit is open,
heat the
replace the component.
water in
- Use a tester to check the continuity at the ends of the
the tub
wires connecting the heating element to the control
unit.
- Use a tester to check the continuity between the two
contacts of the 90° safety thermostat. If the circuit is
open, replace the component.
- If all the above tests are okay, replace the control unit.
Place the control unit in the test mode (see page 6-2), and
move the program knob to the Test 4 position. Wait for the
LEDs to light up, and then test the motor. If the motor does
not run properly:
The motor
does not - Disconnect the motor from the wiring terminal board.
turn prop-
- Use a tester to check the continuity at the ends of the
erly during
wires connecting the wiring terminal board to the con-
a wash
trol unit and check that the connectors are not dam-
and/or spin
aged or dirty.
- Replace the control unit with one known to be in work-
ing order and check that the motor runs. If the motor
runs replace the control unit, otherwise replace the
motor.
Check that the washer/drier filter or the user's drains are
not blocked.
Place the control unit in the test mode (see page 6-2), and
move the program knob to the Test 4 position. Wait for the
LEDs to light up, and then test the pump:
- Remove the wires from the pump and check the conti-
The washer
nuity between the two terminals of the drain pump.
does not
- If the circuit is open, replace the pump.
drain
- If the circuit is closed, remove the pump from the
washer, and use a screwdriver to check for any foreign
material in the scroll.
- Use a tester to check the continuity in the pump
power supply wires. If the tests prove negative replace
the control unit.
6-5
LEDS
PROGRAM KNOB
POSITION
ON
Prewash
Wash
Rinse
Spin
Done
Prewash
Wash
Rinse
Spin
Done
Prewash
Wash
Rinse
Spin
Done
3
4
4