Gram
Electrical Buzz / Transformer or Fan Noise
Oven emits a high-pitched whine or humming noise from the control area.
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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
Vibrating mains transformer on PCB, Noisy cooling fan, Loose mounting of control board, Resonance in metal panels
How to Fix / Troubleshooting
Safety first: Turn off power before removing the top or control panel.
Steps to check:
- With the oven running (qualified person only), carefully localize the noise source to either the cooling fan or the control board area.
- After disconnecting power, tighten mounting screws for the fan and control board.
- If the cooling fan is the source, replace the cooling fan assembly.
- If a transformer or coil on the PCB is buzzing excessively, the main control board may need replacement.
Warning: Avoid touching live parts when diagnosing noise with power applied.
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Repair Difficulty
Medium
3/5
Required Part
Cooling Fan Assembly
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