Microwave shows F14 and the interior light does not work, even though the unit heats normally.

Safety first: Unplug the microwave before replacing the lamp. Glass fragments may be present if the bulb has shattered.

• Step 1 – Access the lamp: On many Indesit models, the lamp is accessible by removing the outer cabinet or a small cover at the rear or side.
• Step 2 – Inspect the bulb: Check if the filament is broken or the glass is blackened. Replace with the correct high‑temperature, microwave‑rated lamp specified by Indesit.
• Step 3 – Check lamp holder and wiring: Ensure the lamp holder is not burnt or cracked and that the wires are firmly connected.
• Step 4 – Test operation: Reassemble and test. If F14 persists and the lamp still does not light, the control board's lamp driver may be faulty.
• Step 5 – PCB diagnosis (advanced): A technician can test the lamp relay/triac on the PCB and replace the board if necessary.

Note: Use only microwave‑approved lamps; standard bulbs may overheat or fail prematurely.