Telefunken
Abnormal Operating Noise
Microwave makes loud buzzing, humming, or grinding 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
Failing high-voltage transformer, Loose or vibrating cooling fan, Worn turntable motor, Debris caught in convection fan (combo models)
How to Fix / Troubleshooting
Safety first: Unplug the microwave before inspection.
- Isolate the noise source: Run the microwave briefly (with a load) and listen carefully to determine if the noise comes from the bottom, back, or side.
- Check turntable system: Remove the glass tray and roller ring, then run the unit. If the noise disappears, the issue is with the turntable motor, coupler, or roller ring.
- Inspect fans: Remove the cover and check the cooling and convection fans for loose blades, debris, or worn bearings. Tighten mounting screws and clean blades.
- Transformer hum: A very loud hum from the transformer area may indicate an internal fault. This should be evaluated and replaced by a professional.
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Repair Difficulty
Hard
4/5
Required Part
Cooling Fan Motor
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