Frigidaire model frs3r5emb8 ser no 4a70817797.
Power surge destroyed circuit board in fresh foods top section. Dealer replaced this board twice but still have the same problem. Freezer, ice maker, and water dispenser works great but freezer does not automaticly defrost and it freezes up and no cold air gets to fresh foods section. Service man puts it into manual defrost then it works good for 5 day then fresh food section gets warm.