Refrigerator not defrosting and the defrost heater and defrost timer have been replaced. the Defrost heater is not heating when on defrost cycle. What could be the problem?
Well, there are only three things in the defrost circuit, and you replace two. The last thing is the defrost thermostat. It is located on the top of the evaporator coil, and is round, and about the size of a quarter, with 2 wires coming to it. Tom ApplianceEducator.com