Fhiaba Evaporator Frost Block Due to Defrost Failure

Freezer is cold but refrigerator is warm; ice forms on the back wall of the freezer.

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.

Possible Causes

Defrost heater failure, Defrost thermostat or sensor failure, Defrost control failure on main PCB, Door gasket leak causing excess frost load

How to Fix / Troubleshooting

Safety first: Unplug the refrigerator and protect the floor from water before defrosting.

Step 1 – Manual defrost:

Remove all food from the freezer and refrigerator.
Leave doors open and allow ice to melt completely (12–24 hours).

Step 2 – Inspect components:

After defrosting, remove the freezer rear panel and inspect the defrost heater and thermostat/sensor.
Look for burned heater sections or loose wires.

Step 3 – Test and replace:

Use a multimeter to test heater continuity and thermostat/sensor function.
Replace any failed components with Fhiaba-specific parts.

Step 4 – Check door gaskets:

Inspect freezer door gasket for gaps or tears that could allow moist air in.
Replace gasket if necessary.

Repair Difficulty

Hard 4/5

Required Part

Defrost Heater

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