I ordered the Heater, the Thermo Bimetal-Protec and the Temp Sensor. I didn't know what all was bad, but I had thawed it out about a month ago thinking it just needed defrosting and wanted to have everything I might need this time because it takes forever to thaw out (12-24 hrs) and to be able to remove the back cover without breaking the styrofoam as it gets frozen to the evaporator. I had chatted online with an advisor who told me how to check each of the 3 components with a multimeter. I determined the temp sensor was still good so I kept it for a spare and changed out the heater and the thermo bimetal-protec. My refrigerator had a thermal fuse that the thermo bimetal-protec replaced as an upgrade. It all seems to be working fine now. I had one piece in 2 days and the other 2 in 3 days using their cheapest shipping option and am extremely satisfied with Appliance Parts Pros in every way.