Senville
Overheating Electrical Component or Dust Burn-Off
Indoor unit emits a burning or electrical smell during operation.
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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
Dust burning off heating elements or coil at first use, Overheating wiring or connector, Failing fan motor, Faulty PCB component
How to Fix / Troubleshooting
Safety: If you smell strong burning or see smoke, turn off power immediately and do not use the unit.
- Step 1 – Initial use: A mild odor at first use after a long period can be normal as dust burns off. It should dissipate within 30–60 minutes.
- Step 2 – Inspect indoor unit: With power OFF, remove the cover and look for discolored or melted wires, especially near the fan motor and PCB.
- Step 3 – Check outdoor unit: Inspect for burnt wiring or components on the outdoor PCB.
- Step 4 – Do not ignore persistent smell: If the smell persists or is strong, stop using the system and call a technician to prevent fire risk.
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Repair Difficulty
Hard
4/5
Required Part
Indoor Main Control Board (PCB)
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