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Bryan, Home Appliance Technician
Category: Appliance
Satisfied Customers: 12156
Experience:  15 yrs. experience as a certified appliance technician.
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Whirlpool WFW9400SW00 shows an F20 error code.

Customer Question

Whirlpool WFW9400SW00 shows an F20 error code.
Submitted: 7 years ago.
Category: Appliance
Expert:  Bryan replied 7 years ago.

F-20 If after 30 seconds not minimum 0.1l of water entered or

maximum fill time of 16 minutes is exceeded, the valves will be

turned off and the error code will be displayed. Press

PAUSE/CANCEL twice to clear the display.

Possible Causes/Procedure

¦ If there is no water in the unit:

- Make sure that both valves at the water source(s) are turned

on all the way.

- Check for plugged or kinked inlet hoses or plugged screens in

the inlet valves.

- Verify inlet valve operation.

¦ If there is water in the unit:

- Verify that the pressure switch hose is in good condition and

properly connected to tub and pressure switch.

1. Unplug washer or disconnect power.

2. Verify there is not a siphon problem.

3. Verify wire harness connections to inlet valves, pressure

switch, flow meter, and Central Control Unit (CCU).

4. Check all hoses for possible leaks.

5. Plug in washer or reconnect power.

6. Verify pressure switch operation.

7. Verify flow meter operation by blowing air through the part

and measuring the resistance.

8. Verify CCU operation by running a Diagnostic test or any cycle. this is what the tech manual says for this error, try the things above and let me know if you can reset this. thanks Bryan

Customer: replied 7 years ago.
How do you run the Diagnostic test and how do you reset the CCU?
Expert:  Bryan replied 7 years ago.

I'll send you the entire manual, follow the instruction for diagnostic mode, heres one manual, and heres the other, just click the blue links, thanks Bryan

Bryan and 4 other Appliance Specialists are ready to help you
Customer: replied 7 years ago.
Received both manuals but they appear to be the same, 20183018, is this correct. Secondly run the diagnostic test and everything checks good. All hoses and drains are good. Have replaced the water fill valves. Could it possible be the flow meter?
Expert:  Bryan replied 7 years ago.
yes it could, how is your water pressure from the house?
Customer: replied 7 years ago.
Water pressure to the house is good. Thanks for the manuals. Will replace the flow meter.
Expert:  Bryan replied 7 years ago.
ok have a great weekend and thanks Bryan