Microwave interior light does not turn on, but the unit heats and operates normally.
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.
Possible Causes
How to Fix / Troubleshooting
Safety: Unplug the microwave before attempting any lamp replacement. Some Bosch models require cabinet removal to access the lamp, which exposes high-voltage components.
- Check user manual: Determine if your Bosch model allows user replacement of the lamp from a dedicated access panel. If so, follow the manual's instructions exactly.
- Use correct lamp type: Replace only with the specified Bosch-compatible microwave lamp (correct voltage and wattage).
If there is no external lamp access: Do not remove the cabinet yourself. Have a Bosch technician replace the lamp and inspect the socket and control board if needed.