Mitsubishi Electric
Indoor Fan Motor Failure
Indoor unit fan does not run, but lights and display are on; compressor may or may not run
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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 DC fan motor, Faulty fan motor driver on PCB, Loose fan motor connector, Jammed fan wheel
How to Fix / Troubleshooting
Safety first: Turn off power at the breaker before accessing the fan.
Steps:
- Check for obstructions: Remove front panel and filters. Ensure the fan wheel is not blocked and can spin freely by hand.
- Inspect wiring: Confirm the fan motor connector is firmly seated on the indoor PCB.
- Test operation: Restore power and command the fan to run at high speed. If there is no movement or only a brief twitch, the motor or driver is likely faulty.
- Replace motor: Replace the indoor fan motor assembly with the correct Mitsubishi Electric part. If a new motor does not run, the PCB driver circuit may need replacement.
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Repair Difficulty
Medium
3/5
Required Part
Indoor Fan Motor
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