Bi-Metal Defrost Thermostat Specificationsif You Have Ice Building Up In Your Freezer, Or If Your Freezer Is Getting Too Warm During The Defrost Cycle You May Need To Replace The Bi-Metal Defrost Thermostat. The Function Of The Defrost Bi-Metal Thermostat Is To Clip Onto The Evaporator And Protect Your Evaporator From Overheating During The Defrost Cycle. If Your Refrigerator Does Not Defrost Properly You Can Test Both The Thermostat And The Heater To Figure Out Which Part Is At Fault. For This Repair, You Will Need A Phillips Screwdriver, A 1/4 Inch Nut Driver, A Flat Blade Screwdriver, A Pair Of Wire Strippers, A Roll Of Electrical Tape, And A Few Butt Splice Connectors. This Part Fixes The Following Symptoms: This Part Fixes The Following Symptoms: Fridge Too Warm | Freezer Not Defrosting | Freezer Section Too Warm | Fridge And Freezer Are 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: Whirlpool, Kenmore, Kitchenaid, Maytag. Part, Wpw10225581 Replaces These: Part, Wpw10225581 Replaces These: Ap6017375,2149849,2161331,2176066,2188824,2196155,2266066,2266067,2315504,2317087,2319914,2321799,2321802,4387498,W10225581,W10260437,Wpw10225581vpCross Parts: Ap6017375, W10260437, 2176066, 2149849, 2319914, 2266067, 2317087, 2266066, Ps11750673, Wpw10225581vp, 2161331, W10225581, 4387498, 2315504, 2196155, 2321802, 2188824, 2321799