Essentials Overheating Electrical Component or Refrigerant Leak Odor

Freezer emits a strong chemical or burning smell when running.

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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

Overheating compressor or start relay, Burned wiring or connectors, Failing main control PCB, Refrigerant oil leak contacting hot surfaces

How to Fix / Troubleshooting

Safety: Immediately unplug the freezer if you smell burning plastic or insulation. Do not continue to operate the appliance.

Steps to investigate:

  • 1. Visual inspection: With the unit unplugged and cooled, remove the rear panel and inspect the compressor area, wiring, and control board for burn marks or melted insulation.
  • 2. Check start relay: Examine the compressor start relay and overload for signs of overheating. Replace if damaged.
  • 3. Inspect wiring harness: Look for discolored or brittle wires. Repair or replace affected sections.
  • 4. Evaluate control PCB: If the smell originates from the control housing, replace the main control PCB.

Warning: If you suspect a refrigerant leak (oily residue on tubing, hissing), contact a refrigeration technician. Do not attempt sealed-system repairs yourself.

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Repair Difficulty

Hard 4/5

Required Part

Compressor Start Relay and Overload
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