Elena M Wilsonville , AL May 02, 2017 Appliance: Frigidaire Washer FAFW3577KW1 Frigidaire Washer Fafw3577kw1: Error code e90. How to replace Electronic Control Board (Main). I started getting error E90 a few weeks ago. At first, if I unplugged and plugged the washer back in, the error cleared and the machine worked like normal. Then, that didn't work anymore. I learned from Google school (and confirmed via this website) that an E90 error meant something was wrong with the control board. I decided to order the part on a Thursday, and got it overnighted so hopefully the repair could be done Friday night and we could get laundry done again. The part came quickly. I watched the YouTube video about replacing the part, and it was great. It went step-by step and showed clearly what screws needed to be taken out, and how to replace the control board. It took me about an hour to do that Friday night. I could have done it more quickly, but I took a couple of breaks here and there. After I replaced the board as the man in the video showed, I plugged the machine back in and it works perfectly. I am sure I saved hundreds of dollars on a repairman, and having to leave work to meet him at the house. My machines are 7 years old and I hope to get many more years out of them. Thanks for the great video! The job would have been a pain without it. 4 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes