Mitsubishi Electric
Overheating Electrical Component
Burning or electrical smell from indoor or outdoor 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
Overheated wiring or terminal, Failing fan motor or compressor, Burnt PCB components, Foreign object contacting heating parts
How to Fix / Troubleshooting
Safety first: Immediately turn off the unit and switch off the breaker. Do not continue operating the system until inspected.
Steps:
- Visual inspection: After allowing components to cool, open the access panels and look for burnt wires, discolored terminals, or charred PCB areas.
- Check fan motors: Try spinning fan blades by hand (with power OFF). Stiff or seized motors can overheat and should be replaced.
- Do not ignore: Any persistent burning smell indicates a serious fault. Do not attempt to bypass safety devices.
- Call a technician: Have a qualified technician identify and replace the overheated components and check for further damage.
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Repair Difficulty
Professional Required
5/5
Required Part
Indoor/Outdoor PCB or Fan Motor
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