Need help with my 14 month old (yea, just out of warranty) very expensive Kenmore Elite He5T washer. Got a Fault Code error F28. Had Sears come out to troubleshoot and they were firm that the CCU (Electronic Control Unit Part # AP3968080) had died. They wanted over $600 to repair, I told them to go away and gave them $70 for the service call. Ordered part from this great web site, installed it myself and still same problem - Fault code F28.
Not happy shelling out that kind of money and still having same problem so I started troubleshooting myself. Fault code F28 indicates Serial Communication Error between the CCU & MCU. I reseated all the wiring harnesses, check continuity of the motor itself (all good around 6 ohms), ran through the diagnostic routine, but it halts at C:00 because of error code.
Now I’m thinking it’s the MCU, so I pulled it out, looked at all the components and don’t see any obvious problems (no burning, or blown out caps, etc.). I’ve resoldered all joints on the MCU and still no help.
Pretty sure it’s the MCU, but before I do another wallet drain, I wanted to confirm (should have done this posting before buying the CCU) with the help of the experts on this forum.
I’m still without my machine and it’s getting old going to mom’s house to wash! Can anyone help me with this problem? I’m about to shotgun more money and just buy the Motor Control Unit, but really would like some advice first.
[QUOTE=gant;52673]Did you find out your answer to this problem? I have the same thing going on now f28 and can’t get cloths out?[/QUOTE]
I have a Maytag 3000 front load washer and it throws an F28 error code, typically in winter when the house is cold. Figured it was condensation because aiming a fan at the unit and wait an hour and then it would work again. OK in summer. Now it has permanently thrown the code - serial communication from CCU (above the drum) to MCU (below the drum). Took it apart and found the detergent fill tube into the drum leaks a little which drips soapy water down inside. The MCU is inside a plastic box to guard it against splashes but a little soapy water got onto the top connector(serial communications). Took the MCU apart and found the serial connector and PCB finger contacts corroded. Cleaned both and could get the unit working. Fixed the leaky spout with a hose clamp and sealer (when the tub rocks it can make the spout leak so it needs the hose clamp to hold it tight). Put anti corrosion compound onto the connector contacts and fashioned a plastic bag as an umbrella for the MCU to keep soapy water out - just in case it leaks again. Has now been working for a few weeks without problems.
Good luck all.