Adaptive Defrost system — warm fridge, cold freezer
The single most common Whirlpool refrigerator call. Adaptive Defrost board, defrost heater, bi-metal thermostat, and defrost thermistor on WRF, WRX, WRS, and WRT units fail as a system — replacing one part and not the others puts the fridge right back on the schedule. We replace the heater + bi-metal + thermistor as a kit and run a forced defrost cycle to verify before we leave.