Samsung Freezer Evaporator Frost Buildup / Airflow Restriction

Freezer not freezing properly while refrigerator section is cool; no error code displayed.

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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

Failed freezer evaporator fan, Freezer defrost heater failure, Defrost sensor or fuse failure, Iced-over evaporator coils

How to Fix / Troubleshooting

Safety first: Unplug the refrigerator before working in the freezer.

Step 1 – Inspect back wall of freezer:

  • If the rear panel is covered in frost or ice, the defrost system is likely not working.

Step 2 – Manual defrost:

  • Unplug the unit and remove freezer drawers and shelves.
  • Leave the door open for 24 hours to melt all ice (use towels to catch water).

Step 3 – Access and test components (advanced):

  • Remove the rear interior panel to expose the evaporator.
  • Locate the Freezer Evaporator Fan Motor, Defrost Heater, and Defrost Sensor.
  • Test the fan for continuity and free movement; replace if faulty.
  • Test the heater and sensor with a multimeter; replace any open or out-of-range parts.

Note: If all components test good, the Main PCB may not be controlling defrost cycles correctly and should be diagnosed by a technician.

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Repair Difficulty

Hard 4/5

Required Part

Freezer Defrost Heater
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