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

Safety first: Unplug the microwave before accessing the lamp. Some models require cabinet removal; others have an external lamp cover.

Steps:

• 1. Locate lamp access: Check for a small cover on the side or top of the cabinet. If none, the lamp may be accessed only by removing the outer cabinet.
• 2. Replace bulb: Remove the old cavity lamp and install a new one of the same type and wattage specified by MasterChef.
• 3. Check socket: Ensure the lamp is seated firmly and that the socket is not burned or loose.

Note: If a new bulb does not light, the lamp relay or wiring may be faulty and require control board or harness repair.