I'm getting an error code F28. The washer goes off after about a minute then stops.

The F28 error code on this model of washer indicates a communication error between the motor control unit and the computer circuit unit that results in the washer stopping during a cycle
https://www.hunker.com/13410738/how-to-unlock-a-kenmore-washer-he2-code-f28

F28 error code is a communication problem between the CCU and the MCU. Try unplugging the machine for several minutes.

http://www.ukwhitegoods.co.uk/help/fault-codes/laundry-fault-codes/3708-whirlpool-washing-machine-fault-codes.html

Not good! Probably motor control board or motor or wiring harness from control board to motor.

This leads to a Kenmore Video
Whirlpool, Maytag, Kenmore. Same machine different name different trim.

Whirlpool Duet f28 YouTube

http://www.ifixit.com/Answers/View/47666/i'm+getting+a+f28+error+code

bad control board

Hi

This code indicates an electronics communication problem with the washer.Please check this link to get a detailed idea related to the lists of codes and the resolutions to them:-

http://whirlpool.custhelp.com/app/answers/detail/a_id/2885/~/display-shows-an-error-code---front-load-washer

The error code F28 means one or both of these parts are bad.
Motor Control Unit ,Microcomputer Machine Control Unit .
It would be a good idea to order both, as both components have been problematic for error code F28.

Please get back to us if you have further query or else please accept the solution.

Thanks for contacting fixya.com

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.

You can download the online repair manual in the below link

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

On page# 4-20 it shows how to access your MCU.

Hi,
The following list of codes indicates an electronics communication problem with the washer:
Duet HT® washer - F01, F03, F06, F11, F23, F24, F27, F28, F29, F30, F31, F32, F35, F42, F61, F62, F63, F64, F65, F70, F71, and F99
Duet® washer - F05, F07, F09, F10, F11, F13, F14, F15, F21, F22, and FdU
Duet SportTM washer - F01, F11, F23, F24, F27, F28, F29, F30, F31, and F33

To remove the error display, press Pause/Cancel twice.

If Pause/Cancel does not work:

1. Unplug washer or disconnect power for one minute.
2. Plug in washer or reconnect power.
3. Re-select the cycle and press Start.

NOTE: If the error remains on the display, call for service.

Take care

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 motor controller error... Try unplugging the machine for a minute or two, then starting it again. If no good, you can remove the access cover and check the connections to the motor... BE SURE TO UNPLUG FROM WALL FIRST...

Peace,