Westinghouse
Abnormal Operating Noise
Microwave runs but makes loud buzzing, grinding, or rattling noises during operation.
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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
Worn turntable motor,Loose or damaged turntable coupler,Loose cooling fan blade or debris in fan,Failing high-voltage transformer humming under load
How to Fix / Troubleshooting
Safety first: Unplug the microwave before inspecting moving parts.
User-level checks:
- 1. Isolate the noise: Remove the glass tray and roller ring, then run the microwave with a cup of water. If the noise stops, the issue is with the turntable components.
- 2. Inspect tray and roller ring: Check for cracks, chips, or debris. Clean and replace if damaged.
- 3. Check coupler: Ensure the plastic coupler is not cracked and fits tightly on the motor shaft.
Advanced steps:
- 4. Inspect cooling fan: Remove the cover and check the fan for loose blades or foreign objects.
- 5. Listen to transformer: A very loud hum from the transformer area may indicate HV issues; further diagnosis by a technician is recommended.
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Repair Difficulty
Medium
3/5
Required Part
Turntable Motor
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