Defrost Heater And Thermostat Assembly Specificationsthe Heater Is Located Beneath The Coils That Are Located Behind The Panel In The Freezer Section. The Heater Will Get Hot And Melt Any Ice Or Frost Build Up Around The Coils. The Thermostat Will Sense The Temperature Increase In The Evaporator During The Defrost Cycle And Will Cycle The Defrost Heater Off After The Ice Or Frost Is Melted. This Part Fixes The Following Symptoms: This Part Fixes The Following Symptoms: Fridge Too Warm | Freezer Not Defrosting | Freezer Section Too Warmthis Part Works With The Following Products: This Part Works With The Following Products: Refrigerator. This Part Works With The Following Products: This Part Works With The Following Products: Maytag, Jenn-Air, Hoover. Part, Wp61006198 Replaces These: Part, Wp61006198 Replaces These: Ap6010104,61003864,61004309,61006150,61006151,61006198Cross Parts: 61003864, 61006150, 61006198, 61004309, 61006151, Ap6010104