Gree Outdoor Mechanical Noise / Fan or Compressor Issue

Loud humming, grinding, or metallic noise from 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

Outdoor fan blade hitting shroud or debris, Fan motor bearing failure, Loose compressor mounting bolts, Failing compressor

How to Fix / Troubleshooting

Safety first: Turn OFF power at the disconnect before inspecting the outdoor unit.

  • Step 1 – Inspect fan area: Remove any debris (sticks, leaves, plastic) from the fan guard and blades. Check that the blade is not bent.
  • Step 2 – Check fan blade tightness: With power OFF, gently wiggle the fan blade on the motor shaft. Tighten the set screw if loose.
  • Step 3 – Listen after restart: Restore power and briefly run the unit. If the noise is clearly from the fan, the motor or blade may need replacement.
  • Step 4 – Compressor noise: If the noise comes from the compressor body and is very loud or metallic, shut the unit down and call a technician. The compressor or its mounting grommets may need replacement.
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Repair Difficulty

Hard 4/5

Required Part

Outdoor Fan Motor
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