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

This refrigerator defrost timer automatically starts and ends the defrost cycle to melt frost from the evaporator coils. Replacing a failed timer restores consistent cooling performance and helps prevent frost buildup that can restrict airflow.

• Controls the timed switch between cooling and defrost to keep evaporator coils clear of frost
• Common symptoms of failure: heavy frost on the evaporator or back panel, fresh food section too warm, unit runs constantly, or won't resume cooling after defrost
• Restores proper frost removal and airflow for stable temperatures
• Designed to match the original timer's function and wiring connections for applicable models

• Disconnect power before servicing; wear cut-resistant gloves
• Access location varies by model—often in the fresh food control housing or rear machine compartment
• Photograph/label wire positions and transfer them to the matching terminals on the new timer
• Reuse original mounting hardware and install in the same orientation as the original