Bomann
Overheating Door / Insufficient Ventilation
Microwave door glass or outer surface becomes excessively hot to the touch during operation.
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Safety Warning
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.
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Possible Causes
Blocked ventilation openings, Faulty cooling fan, Degraded door insulation, Prolonged high-power operation without rest
How to Fix / Troubleshooting
Safety: Some warmth is normal, but surfaces should not be too hot to touch briefly. If they are, stop using the microwave and investigate.
- Step 1 – Check clearances: Ensure the microwave has the minimum clearance specified by Bomann on all sides and top.
- Step 2 – Clean vents: Remove dust and grease from all vents. Do not cover vents during operation.
- Step 3 – Verify cooling fan: Listen for the cooling fan during operation. If it is not running, test and replace the fan motor.
- Step 4 – Door inspection: If the door glass is extremely hot, the internal door insulation or glass assembly may be compromised and should be replaced.
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Repair Difficulty
Medium
3/5
Required Part
Cooling Fan Motor
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