Samsung Compressor Start / Inverter Failure

Refrigerator lights and display work but compressor and fans do not run; interior warms up.

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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 inverter PCB, Seized compressor, Loose compressor wiring, Main PCB not sending run signal

How to Fix / Troubleshooting

Safety first: High-voltage and sealed system components are involved; DIY is limited.

Step 1 – Listen for compressor:

  • Stand at the back of the refrigerator and listen for a low humming sound from the compressor.
  • If completely silent for long periods, suspect a start or inverter issue.

Step 2 – Check for error codes:

  • Some models may log compressor-related codes (e.g., 84C, 85C); if present, follow those procedures.

Step 3 – Basic checks:

  • Ensure the unit is not in Demo Mode (OF OF on display).
  • Verify temperature settings are not turned off.

Step 4 – Professional service:

  • If the compressor does not run and no simple setting is at fault, a technician should test the Inverter PCB, Compressor, and Main PCB.
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Repair Difficulty

Professional Required 5/5

Required Part

Inverter PCB (Compressor Inverter Board)
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