I had "professionals" come out 2 times and they kept replacing parts, but I did a little research and assumed it was one of the sensors in the Brake Case. I bought the part from AppliancePartsPros mostly because of the comments from other people who did the same. I replaced the part and it worked fine. Once I started inspecting the old part, I noticed what appeared to be a "bug" in one of the channels... I fished it out using some wire and now I have a backup part. The sensors were fine, there was a bug in the part.