Error code related to “F dH” or “F DH” and freezer section shows heavy frost; cooling is poor.

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.

Possible Causes

Open freezer defrost heater, Burned heater connector, Failed defrost thermostat in freezer, Wiring break between heater and PCB

Safety: Unplug the unit before servicing the defrost system.

Access freezer evaporator: Remove drawers and rear panel to expose the evaporator and heater.
Inspect heater: Look for burn marks or broken heater elements.
Test continuity: Disconnect heater and measure resistance. Replace if open.
Check thermostat and wiring: Test the defrost thermostat for continuity when cold and inspect wiring for damage.
Replace faulty components: Install a new heater and/or thermostat as needed, reassemble, and restore power.

Hard 4/5

Freezer Defrost Heater

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