Electrolux Transformer / Power Supply Noise

Unit emits a buzzing or humming electrical noise even when not actively heating.

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.

Possible Causes

Vibrating transformer or inductor on PCB, Loose mounting of PCB, Electrical noise from mains

Safety first: Unplug before opening the housing.

Steps:

Verify normal behavior: Some low-level hum from the power supply can be normal. Compare with another similar unit if possible.
Secure PCB: Ensure the main control PCB is firmly mounted and not vibrating against the housing.
Dampening: If a specific transformer or inductor is vibrating, a technician may apply approved insulating compound. For most users, replacing the PCB is the practical solution.

Hard 4/5

Main Control PCB

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