Senville
Outdoor Mechanical Noise
Loud humming, grinding, or metal-on-metal noise from the 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
Failing outdoor fan motor bearings, Loose fan blade, Compressor mounting issues, Debris contacting fan blade
How to Fix / Troubleshooting
Safety: Turn off power at the disconnect before inspecting the outdoor unit.
- Step 1 – Inspect fan area: Remove top grille if needed and check for sticks, leaves, or ice contacting the fan blade.
- Step 2 – Check fan blade: Ensure the blade is tight on the motor shaft and not bent. Tighten the set screw if loose.
- Step 3 – Spin test: With power OFF, spin the fan blade. Rough or noisy rotation indicates bad motor bearings; replace the motor.
- Step 4 – Compressor noise: If noise comes from the compressor body, some humming is normal, but loud grinding or knocking may indicate internal failure requiring professional evaluation.
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Repair Difficulty
Medium
3/5
Required Part
Outdoor Fan Motor
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