Customer Questions and Answers for Defrost Timer (162-4) by Whirlpool

This mechanical defrost timer manages the automatic defrost cycle in your refrigerator. It periodically powers the defrost heater and then returns the system to cooling, helping prevent frost buildup and temperature swings.

• Controls the timing of automatic defrost intervals for the evaporator
• Switches power between the compressor and defrost heater
• Helps maintain airflow and consistent cooling by clearing accumulated frost
• Common failure symptoms: heavy frost on coils or freezer walls, warm fresh food section, unit stuck in defrost, or a timer that won't advance

• Disconnect power before servicing; use gloves to protect from sharp edges
• Access the timer (typically in the control housing or rear service area) and remove mounting screws
• Note wire positions or take a photo; transfer wires to the new timer one at a time
• Mount securely and restore power; monitor for normal compressor/defrost operation