FIXED WFW8300SW04 Whirlpool duet f28 error code

Mcnabb75

Premium Member
Joined
Sep 26, 2018
Messages
54
Location
Greenville SC
Model Number
WFW8300SW04
Brand
Whirlpool
Age
More than 10 years
Model:WFW8300SW04
F28 code
Question. If the drain pump and water inlet valves do not come on with the MCU unplugged, does that help determine whether or not it is the MCU or Main control board?
Ground wires/switches good.
Wiring ok.
Resetting did not work.
Unit will start, door lock will engage, and then it just sits until the "add garment" light begins to flash.

Thanks

Jon
 

Jake

Appliance Tech - Admin
Staff member
Joined
Aug 24, 2004
Messages
102,813
Location
McMullen Valley, Arizona
Question. If the drain pump and water inlet valves do not come on with the MCU unplugged, does that help determine whether or not it is the MCU or Main control board?
Hi Jon, I have not heard of that before.

F28--->The communication between the Central Control Unit (CCU) and the Motor Control Unit (MCU) cannot be sent correctly.

Possible Causes/Procedure
1. Unplug washer or disconnect power.
2. Check wire harness connections to the MCU, the motor, and Central Control Unit (CCU).
– Check connections of the CCU board within the housing.
– Make sure all grounding switches are engaged.
3. Check the drive system for any worn or failed components.
4. Plug in washer or reconnect power.
5. Verify CCU operation by running a Diagnostic Test or any cycle.
6. Check the MCU by looking for operations of the drive motor.
7. Check the drive motor for powered rotations.
8. Check that the serial harness at the MCU is not mounted upside down. The wires should be to the left when facing the MCU connectors.

Also make sure the access panels are in place when you run the machine, the ground switches have to be closed or you will also get F28.

If you've done all the above, then 99% of the time the problem is the MCU, you can order it below and if it doesn't fix it you can return it for a full refund, less shipping.

Here's the MCU for your model you can order:
Motor Control Board WPW10197864


Jake
 

Jake

Appliance Tech - Admin
Staff member
Joined
Aug 24, 2004
Messages
102,813
Location
McMullen Valley, Arizona
Excellent Jon, glad to hear the new MCU fixed it.:)

Thanks for the update!

Jake
 
Top