KitchenAid Freezer Evaporator Frost Block or Fan Failure

Freezer warms up while refrigerator section stays relatively cool; ice melts and refreezes.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Defrost heater failure, Defrost thermostat stuck open, Evaporator fan motor failure, Ice buildup blocking airflow

How to Fix / Troubleshooting

Safety first: Disconnect power before removing freezer panels. Avoid using sharp tools to remove ice.

Steps to resolve:

  • Inspect frost pattern: Remove the freezer rear panel. If the evaporator is encased in solid ice, the defrost system is not working.
  • Manual defrost: Unplug the refrigerator and allow all ice to melt completely (this can take 12–24 hours). Use towels to catch water.
  • Check fan: After defrosting and reassembly, restore power and listen for the evaporator fan. If it does not run, the fan motor or wiring is faulty.

Because defrost system diagnosis requires electrical testing of the heater and thermostat, further repair should be handled by a qualified technician.

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Repair Difficulty

Hard 4/5

Required Part

Defrost Heater
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