Refrigerators

Refrigerator Defrost Heater Replacement Guide: Symptoms, Fit & Install

The defrost heater melts frost and ice that accumulates on the evaporator coils during the refrigerator's defrost cycle. This prevents ice buildup from obstructing airflow and cooling.

DPD WR51X442 Refrigerator Defrost Heater & Thermostat Kit for GE Hotpoint Kenmore, Replaces AP2071464, 1972, WR51X442, WR51X0342, WR51X0371,
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DPD WR51X442 Refrigerator Defrost Heater & Thermostat Kit for GE Hotpoint Kenmore, Replaces AP2071464, 1972, WR51X442, WR51X0342, WR51X0371,

  • 【Part Number】: WR51X442 defrost heater.
  • 【Include】: defrost thermostat and 2 defrost heaters
  • 【Function】: The defrost heater keeps the cooling coils from frosting over and the thermostat senses that the heat near the cooling coils has reached the desired temperature. Used with side by side models.
  • 【Premium Quality】: The replacement part is made from high quality material for long lasting
  • 【Promise】: Discount Parts Direct is a US based company, from molding, stamping to assembly, inspection of each process has strict quality requirements and hand check
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What the WR51X442 does

The defrost heater melts frost and ice that accumulates on the evaporator coils during the refrigerator's defrost cycle. This prevents ice buildup from obstructing airflow and cooling.

Symptoms when this part fails

  • Excessive frost buildup in the freezer compartment
  • Refrigerator not cooling properly
  • Food spoiling in the refrigerator section
  • Water leaking inside or outside the appliance
  • Refrigerator running constantly

Compatibility

Fits the Kenmore family. Specifically:

  • Any unit originally equipped with OEM part number(s): AP2071464.
  • Check the model/rating plate inside your appliance and compare it against the fitment table on the product listing before ordering — this guide does not list specific compatible models because Amazon does not provide verified fitment data through this pipeline.

Also replaces: AP2071464

Tools you'll need

  • Screwdriver set (Phillips and flathead)
  • Nut driver or socket set
  • Pliers
  • Putty knife or scraper
  • Multimeter

Difficulty: Moderate · Time: 1-2 hours

How to install the WR51X442, step by step

  1. Disconnect refrigerator power at the wall outlet or circuit breaker.
  2. Empty the freezer compartment and remove shelves and drawers.
  3. Locate and remove the rear freezer panel to access the evaporator coil.
  4. Disconnect the old defrost heater wiring and remove its mounting clips.
  5. Install the new defrost heater, ensuring secure connections and proper mounting.
  6. Replace the freezer panel, shelves, and drawers.
  7. Restore power to the refrigerator.

Related troubleshooting

If swapping this part doesn't fix the issue, check these next:

Disclaimer: This guide is for informational and educational purposes only. Always disconnect power before working on appliances. If you're not comfortable with any step, call a qualified appliance technician.
The Appliance Aid Team

Researched and written by the Appliance Aid Team. We work from manufacturer service documentation, parts specifications and owner reports — not hands-on repairs. How we pick products.