Microwave interior light does not come on, but the unit heats and otherwise works normally.

Safety first: Unplug the microwave before replacing the lamp.

• Step 1 – Access lamp: Remove the lamp cover (often behind a grille or side panel) according to the Bertazzoni manual.
• Step 2 – Replace bulb: Install a new, manufacturer-approved microwave lamp of the same wattage and base type.
• Step 3 – Inspect socket: Check the lamp holder for heat damage or loose contacts. Replace if necessary.
• Step 4 – Test: Restore power and open the door to confirm the light operates.