Product review (5 stars): F1 error code, be gone with you!
Fixed my F1 error code like a complete champ, despite Whirlpool support's insistence that it wouldn't in my model year. We called somebody out the house to address what Whirlpool claimed was a "pressure sensor problem", and it turned out it's the control board. Took less than 10 minutes to replace, and new unit functions even better than the old one did before the error code.