Product review (5 stars): Old frig constantly ran and had lots of frost build up in the cooling coils.  Cheap fix to keep your frig running for a long tim
Worked like they should.  No defrost issues anymore.  The user must install a new clock defrost timer and thermocouple also, to make sure all three problem areas are covered.  All are easy to do.  Just make sure you get the right parts for the replacement.