Customer Questions and Answers for Defrost Timer (Assembly) by Whirlpool

This defrost timer assembly cycles the refrigerator between cooling and defrost modes to prevent excess frost buildup and help maintain consistent temperatures. Replace a failed timer to restore regular defrost scheduling and reduce icing. What it does:

• Advances the refrigerator between cooling and defrost cycles on a timed schedule.
• Stops missed defrosts that can cause frost buildup on the evaporator and reduced cooling efficiency.
• Addresses symptoms such as excessive frost/ice, inconsistent temperatures, or a freezer that runs constantly.
• Acts as the control that engages the defrost heater and returns the unit to cooling when the cycle finishes.

• Disconnect power to the appliance before servicing to avoid shock or injury.
• Access the timer via the control panel or rear service area; document wiring or take photos before disconnecting.
• Install the timer in the same orientation and reconnect wires to the original terminals; do not force connectors.