Maytag MHWC7500YW0 Manual page 15

FOR SERVICE TECHNICIAN ONLY - DO NOT REMOVE OR DESTROY
WASHER
DISPLAY EXPLANATION AND RECOMMENDED PROCEDURE
F 22
LOAD DETECTED IN WASHER
DURING CLEAN WASHER CYCLE
The washer detects a load inside the washer drum
at the beginning of the Clean Washer Cycle.
Possible Causes/Procedure
1. Make sure that there is no load in the drum.
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.
F 23 PRESSURE SWITCH ERROR
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.
F 2 4
VALVE LEAKAGE/OVERFLOW FAILURE
Overflow level has been reached 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 buildup 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 valve, 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.
F 26 PUMP DRIVE SYSTEM ERROR
The connection between pump and the Central Control
Unit (CCU) is lost during cycle drain.
Possible Causes/Procedure
1. Verify CCU operation by running a Quick Diagnostic
Test or any cycle.
2. Unplug washer or disconnect power.
3. Check wire harness connections to the pump and
Central Control Unit (CCU).
4. Plug in washer or reconnect power.
WASHER
DISPLAY
F 2 7
F 28
F 2 9
PAGE 15
EXPLANATION AND RECOMMENDED PROCEDURE
MOTOR CONTROL UNIT ERROR
Motor reversing error.
Possible Causes/Procedure
1. Verify the shipping system, including shipping bolts,
spacers, and cables, is removed.
2. Perform Quick Diagnostic Test.
3. Unplug washer or disconnect power.
4. Check wire harness connections between the drive
motor and the motor control board, and to the
Central Control Unit (CCU).
MOTOR CONTROL UNIT ERROR
Motor high speed switch error.
Possible Causes/Procedure
1. Verify the shipping system, including shipping bolts,
spacers, and cables, is removed.
2. Perform motor Quick Diagnostic Test.
3. Unplug washer or disconnect power.
4. Check wire harness connections between the drive
motor and the motor control board, and to the
Central Control Unit (CCU).
DOOR SWITCH ERROR
Door is not detected to be open and closed for 3
continuous cycles.
Possible Causes/Procedure
1. Power on the washer, and rotate the cycle control
knob to any cycle position, open the door, and then
close. Then press start button to determine if the
error cleared. If the failure display condition still
exists, go to step 2.
2. Run Quick Diagnostics Test to check door lock
system.
3. Unplug washer or disconnect power.
4. Check the electrical connections at the side of door
switch and the side of CCU, to make sure the
connection is correct.
5. Verify if the switch contacts are stuck closed.
If closed and the door is open, replace the door
switch mechanism.
6. Plug in washer or reconnect power.
7. If the above does not correct the problem,
go to step 8.
8. Unplug washer or disconnect power.
9. Replace door switch.
10. Replace CCU.