Microwave interior light does not come on when door opens or during cooking, but unit heats normally.

Safety: Unplug the microwave before attempting lamp replacement. Follow the SMEG manual; some models require technician replacement.

User steps (if lamp is user-serviceable):

• Locate the lamp access cover as described in the manual.
• Remove the cover and gently unscrew or pull out the lamp, depending on type.
• Install a new lamp of the exact type and rating specified by SMEG.
• Reinstall the cover securely before plugging the unit back in.

If the new lamp does not work, the lamp holder or control circuit may be faulty and will require professional service.