Nadeya M Briarcliff Manor , NY June 01, 2015 Appliance: Model VIFB530 Viking all freezer evaporator coils frosting & temperature in freezer dropping This has been a recurring problem. We had already replaced the thermistor (defrost sensor), the coils, the fan.. So, this time, we replaced this terminator. Freezer seems to be ok now.. its been 3 days. Repair was easy to do - did it myself (and I can't even operate a drill). Fingers crossed. Read More... 4 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes Tools: Nut Drivers