Neff Fan or Transformer Acoustic Noise

Microwave emits a high-pitched squeal or whine during operation.

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

Worn fan motor bearings, Loose fan blades, Vibrating transformer laminations, Loose mounting screws

Safety: Unplug before removing covers.

Checks:

Remove the cabinet and identify whether the noise comes from the fan or transformer.
Tighten mounting screws on the transformer and fan.
Replace a noisy fan motor.

If the transformer is the source and heating is normal, it may be safe but annoying; replacement is the only cure. Consult Neff if in doubt.

Medium 3/5

Cooling Fan Motor

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