Bosch Fan bearing lubrication failure

Bosch oven produces a high-pitched squealing noise during fan 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

Dry or worn fan motor bearings, Misaligned fan blade rubbing housing, Debris caught between fan and shroud

Safety first: Disconnect power before working near moving parts.

Access fan: Remove the inner rear panel to reach the convection fan.
Check clearance: Ensure the fan blade does not rub against the shroud. Gently bend the blade or shroud if needed to restore clearance.
Clean debris: Remove any baked-on residue or foreign objects around the fan.
Replace motor: If squealing persists, the motor bearings are likely worn and the motor should be replaced; lubrication is usually not a permanent fix.

Medium 3/5

Convection Fan Motor

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