I have a wfw8300 whirlpool washer i keep getting an f28 error

For the F28 error code:
First, check the wiring harness connections to the MCU, the Motor, and the CCU. Make sure all the connections are tight and there are no ground wires off. Then check the connections of the CCU board within the housing.

If the wiring connections are fine then It would be a good idea to order both, as both components have been problematic for the error code F28.


Here is the CCU to order.

Here is the MCU to order.

The F28 code is a comm failure between the MCU and the CCU. First, check the wiring harnes connections to the MCU, the Motor, and the CCU. Make sure all the connections are tight and there are no ground wires off. Then check the connections of the CCU board within the housing.

Yes, I read a couple past members that diagnosed it as the MCU being the cause more than the CCU.

So you can order the MCU and/or the CCU, then I'd install the MCU first to see if that fixes it.

For the F28 error code:
First, check the wiring harness connections to the MCU, the Motor, and the CCU. Make sure all the connections are tight and there are no ground wires off. Then check the connections of the CCU board within the housing.

If the wiring connections are fine then It would be a good idea to order both, as both components have been problematic for the error code F28.
Here is a link to the CCU.
Here is a link to the MCU.

F28 is a s error from the CCU to the MCUUnit.

remove the lid and the back of the machine.
CCU is the box at the top front right hand corner.
look for connector M13 with a red mark on it and only 3 wires disconnect it and pull gently on the connector.
Spray the contacts of the connector and computer with connector cleaner.
put back together.......

MCU is at back lower left corner.
Find the connector with 3 wires and red mark, pull off this connector , spray it and put it back....should be job done...............

cheers

Hi,
The F-28 code is a communication error between the Central Control Unit (CCU) and the Motor Control Unit (MCU).

1.Unplug the washer
2.Check the wire harness connections to the MCU, the motor, and the CCU
Check connections of the CCU board within the housing.
Make sure all grounding switches are engaged.
1.Check the drive system for any worn or failed components.
2.Plug in washer or reconnect power.
3.Verify CCU operation by running a Diagnostic Test or any cycle.
4.Check the MCU by looking for operations of the drive motor.
5.Check the drive motor for powered rotations.
6.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.

Hope this helps.

Shane

Hi, the error code F28 means one or both of these parts are bad.

• Motor Control Unit (8540135)
• Microcomputer Machine Control Unit (8540788)

It would be a good idea to order both, as both components have been problematic for error code F28. If you find either the MCU or the CCU(Microcomputer Machine Control Unit) fixed it.

Error code F28 indicates that one of the below part is bad

• Motor Control Unit (8540135)
• Microcomputer Machine Control Unit (8540788)

If you find either the MCU or the CCU(Microcomputer Machine Control Unit) you can fix it,

Here's the online repair manual for Whirlpool Duet Sport, but its identical to your HE2.

Refer page# 4-20 it describes how to get to MCU.

https://secured.whirlpool.com/Service/SrvTechAdm.nsf/2cd44500d572193285256a45004fd9d6/6545d78b3f479480852571650061b1ba/$FILE/8178558.pdf

F28 is a serial bus error from the CCU (Central Control Unit) to the MCU (Motor Control Unit).

All you need is some Electronics contact cleaner spray and a 1/4 inch socket to remove the top of the machine and the back of the machine.
The CCU is the computer looking box at the top front right hand corner.
Find connector M13, (has red marking on it and only 3 wires) disconnect it by pushing the retainer tab back and pulling gently on the connector.
Spray the contacts of the connector and computer with connector cleaner.
Then re-assemble connector.
The MCU is in the back lower left corner.
Find the connector with 3 wires and red mark, and remove this connector in the same way you did the other, spray it and re-install.
Put the back and top back on.

Thanks for using FixYa - a 4 THUMBS rating is appreciated for answering your FREE question!!!!

You can call whirlpool for service but the tech sheet f28 has a communication problem from you computer to the motor..

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.

F28 error is..
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

If it is new call for service...