Product review (5 stars): dont be afraid to fix it yourself
Fix it yourself and save a lot of money. My Frigidaire front load washer was only 4 years old when it starting flashing an e90 code. Called in an appliance repairman and they charged me $85 for nothing. Said it would cost $600 more to fix it, and I said good-bye.

Got a replacement main board for about $130 and installed it myself. I have a load running right now. Sweet!

The repairman didn't even tell my wife which board was bad. Luckily I used my noggin and realized the second board was the same one that was in the dryer, so I used that one to make sure my problem was the main board.