Whirlpool WFC7500VW0 User Manual page 77

SERIAL COMMUNICATION ERROR
F21
The communication between the Central Control Unit (CCU) and the user interface board (UI) cannot be sent correctly.
Possible Causes/Procedure
1. Run Quick Diagnostics Test to check the User Interface boards and motor.
2. Unplug washer or disconnect power.
3. Check wire harness connections to the user interface and Central Control Unit (CCU).
Check connections of the CCU board within the housing.
Make sure all grounding switches are engaged.
4. Check that the serial harness at the UI.
5. Plug in washer or reconnect power.
LOADS DET ECTED DURING CLEAN WASHER CYCLE
F22
The load is detected in the drum during the start of clean washer cycle.
Possible Causes/Procedure
1. Make sure that there is no load in the drum. If the drum is empty.
2. Rotate drum by hand to check for any binding of the spin basket. Possibility of clothing stuck between spin basket and
outer tub or the rear seal may not be seated flush against rear bearings.
3. Check the drum's fixation.
PRESSURE SWTICH ERROR
F23
The wash level and level heater safety are switched on at the same time
Possible Causes/Procedure
1. Unplug washer or disconnect power.
2. Check wire harness connections to pressure switch and Central Control Unit (CCU).
3. Check connections of the CCU board within the housing.
4. Check the pressure switch for worn or failed conditions .
VALVES LEAKAGE/OVERFLOW FAILURE
F24
Overflow level has been reached for more than 5 times, but each period is shorter than 2 seconds.
Possible Causes/Procedure
1. Check the drain hose and make sure it is not plugged or kinked.
2. Remove hose from pressure switch. Dislodge any debris build up in the hose inside the outer tub.
3. Unplug washer or disconnect power.
4. Check wire harness connections to the drain pump, pressure switch, water inlet value, and Central Control Unit (CCU).
5. Check/clean drain pump filter of foreign objects.
6. Check for drain pump failure.
7. Check the inlet valve for proper shut off.
8. Check the pressure switch for proper operation.
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