Greetings All, New poster here. Glad to have found this forum. I have a 2.5 yr old Duet washer that has worked really well with one to two loads a day for a long time. Unit now has me chasing my tail. Initially had the 3 beeps of death on pushing the go button. Showed F70 (main brain CCU hearbeat failure) and the on-board diagnostics ( found tech sheet ) confirmed it. Went for the obvious loose harness / connector reseating, put it back together and wam! she works for 1 complete cycle then next one it stops mid spin and flags F71 (User interface heartbeat fail ) Say What? . I get back into it, research web sites and go for more harness reseating. Put it all back together and then a big fat F22 (door lock ) shows up. Then I did realize I was troubleshooting with panels off and there are interlocks so that could have skewed some error logic. OK, reseat all on lock unit and fire her up. Man she's looking like she gonna work and BAM back to the good old F70!!! I see from a lot of posts that this has happened to a lot of folks and after they do a CCU swap, still no joy. At $200 a guess, I am trying to fine tune my guessing skills, hopefully with ya'lls kindhearted help. I am thinking with all this shape shifting of codes, it just could be the main brain board flipping out, digitally speaking. Thanks to any and all for any help rendered. Man I hate being at the mercy of the big blue repair van man unless I have to.

Understand the circular nature of this troubleshooting loop. Will advise on what the end result is.