Customer Questions and Answers for Wire Harness (Evaporator Heater) by Whirlpool

This wire harness connects the refrigerator's evaporator defrost heater to the appliance wiring. A damaged or burned harness can interrupt the defrost circuit, leading to frost buildup and temperature swings. Replacing it helps restore reliable defrost performance. What it does:

• Routes power to the evaporator defrost heater within the freezer/evaporator compartment
• Provides the correct, model-specific connectors for a secure, factory-style connection
• Failure may present as heavy frost on the evaporator, reduced airflow/cooling, or heat-damaged/brittle connectors
• Helps resolve intermittent or inoperative defrost heat

• One wire harness assembly

• Disconnect power before servicing; interior panels and evaporator fins can be sharp—use cut-resistant gloves
• Remove the evaporator cover to access the heater wiring; note original routing and clip locations for reinstallation
• Fully seat/lock all connectors and keep wiring clear of the fan blade, sharp edges, and the heater element
• After reassembly, restore power and monitor for normal cooling and frost-free operation over the next defrost cycle