I need a wiring diagram. I bought the Whirlpool book which has content from 20 years ago. The book claims there is a bimetal temp sensor on the evaporator, but your parts don't show it. I have small amounts of water and ice in the refrigerator. Replaced the defrost timer, but still happens. The book says could be heating element so I ordered that today from you. I don't kno wif there is a nother part that could be causing this. Refrig and freezer temp are fine. My thought is it is not actually defrosting correctly.

Thanks