Sandra A San Lorenzo , CA July 04, 2019 Appliance: Frigidaire Washer FAFW3577KW1 Frigidaire Washer Fafw3577kw1: E90 error code on my washer. How to replace Washer Electronic Control Board. Ordered the electrical control board. Delivery was quick and I appreciated that. The replacement of the old was pretty straight forward and went relatively fast. I removed the screws and easily popped in the new board. Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes