Costway
Electrical Overheating / Component Failure
Strong chemical or burning smell coming from the rear of the unit.
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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 main control board, Failing fan motor winding, Loose electrical connection arcing, Melted insulation on wiring
How to Fix / Troubleshooting
Safety: Immediately unplug the cooler. Do not continue to operate a unit that smells like burning plastic or insulation.
Steps:
- Visual inspection: After the unit cools, remove the rear panel and inspect the main control board, fan motors, and wiring for burn marks or melted plastic.
- Tighten connections: Check all spade and screw terminals for tightness. Loose connections can overheat.
- Replace damaged parts: Replace any burned wiring harnesses, fan motors, or the control board as needed.
- Do not ignore: If you cannot identify the source, have a qualified technician inspect the unit before using it again.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control Board
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