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

Safety first: Unplug the microwave before replacing the lamp.

• Step 1 – Access lamp: Remove the outer cabinet or dedicated lamp cover, depending on your Indesit model.
• Step 2 – Replace bulb: Fit a new microwave‑rated lamp of the correct wattage and base type as specified by Indesit.
• Step 3 – Check holder and wiring: Ensure the lamp holder is secure and wiring is intact.
• Step 4 – Test: Reassemble and test. If the new lamp does not light, the control board's lamp circuit may be faulty and require professional diagnosis.

Note: Do not use standard household bulbs; they may not withstand the heat and vibration.