Product review (5 stars): Everything works great. This was a lot less expensive than replacing ...
Well, after replacing a thermostat in the refrigerator side, with no change, then the defrost heater, still no change.  This Defrost Bimetal thermostat finally fixed the freezer from freezing up without defrosting and the refrigerator side getting to warm. Now the freezer defrosts properly, and not freezing up, which was blocking the refrigerator side from getting cold air and was getting to warm. Its been almost a month now. Everything works great.  This was a lot less expensive than replacing the whole unit. Received the Whirlpool Defrost Bimetal thermostat very quickly, actually several days earlier than what was specified. Would purchase from this company again.