Instant
Electrical Noise / Coil Whine
Unit emits a high-pitched whine or electrical buzzing sound.
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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 transformer or inductor on main board, Loose mounting of control board, Fan motor electrical noise
How to Fix / Troubleshooting
Safety first: Unplug before opening the housing.
- Identify source: Listen carefully to determine if the noise comes from the fan area or control board area.
- Tighten mounts: Tighten screws securing the main control board and fan motor to reduce vibration.
- Inspect components: Look for loose coils or components on the board that may vibrate; gently secure with approved high-temperature silicone if appropriate.
- Replace noisy part: If the noise is excessive or accompanied by malfunction, replace the fan motor or main control board as indicated.
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Repair Difficulty
Hard
4/5
Required Part
Main Control Board
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