AEG Electrical Noise from Power Supply or Fan Motor

AEG air fryer produces an unusual high-pitched whine 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

Vibrating SMPS transformer or inductor, PWM-driven fan motor resonance, Loose coil on main PCB

How to Fix / Troubleshooting

Safety first: Unplug before opening the control housing.

Steps to reduce whine:

  • Confirm source: Listen carefully to determine if the noise comes from the fan area or the control board area.
  • Fan-related: If from the fan, inspect and replace the circulation fan motor if the noise is excessive or accompanied by vibration.
  • PCB-related: If from the control board, inspect inductors and transformers. Gently pressing on them (with power off) may reveal loose windings. Applying a small amount of approved varnish or replacing the main control board can resolve the issue.
  • Acceptable noise: Some mild high-frequency noise is normal with PWM control, but loud or worsening whine indicates a developing fault.
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Repair Difficulty

Hard 4/5

Required Part

Main Control Board
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