Princess Electrical Coil Whine / Vibrating Components

Unit makes a high-pitched whining or buzzing noise from the electronics area.

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 main PCB, Loose PCB mounting, Resonance in mains filter components, Failing fan motor causing electrical noise

Safety first: Unplug the unit before opening the electronics compartment.

Steps to reduce noise:

Identify source: With the cover removed (and using extreme caution if testing live), localize the noise to the main control PCB or mains filter.
Secure components: Ensure the PCB is firmly screwed down and that large components are not loose.
Replace noisy board: If the noise is excessive or accompanied by malfunction, replace the main control PCB or mains filter board.

Hard 4/5

Mains Filter / Main Control PCB

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