Microwave makes loud buzzing or humming noise while running, louder than normal, with reduced or no heating.
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.
Possible Causes
How to Fix / Troubleshooting
Danger: Loud abnormal buzzing from an LG microwave often indicates a high-voltage fault. Unplug the unit immediately and do not use it.
User actions:
- Do not restart: Repeated attempts can cause further damage or risk of fire.
- Check for burning smell: If you detect any burning odor, keep the unit unplugged and move it away from flammable materials.
Diagnosis and repair of high-voltage components must be performed by a trained technician with proper tools and safety procedures.
Repair Difficulty
Required Part
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