Bomann Convection Fan Mechanical Noise

Oven makes a loud rattling or grinding noise when the fan is running.

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

Loose fan blade on the motor shaft, debris caught in the fan blades, worn fan motor bearings, or a bent fan impeller.

Safety: Disconnect power before accessing the fan.

Steps:

Remove the rear panel or the internal fan cover inside the cavity (depending on the model) to access the convection fan.
Check for loose screws or debris (e.g., foil, food particles) around the fan and remove them.
Ensure the fan blade is firmly attached to the motor shaft; tighten or replace if loose.
Spin the fan by hand; if it feels rough or noisy, replace the convection fan motor and impeller if needed.

Medium 3/5

Convection Fan Motor

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