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

Safety: Unplug the microwave before replacing the lamp. Some models require removal of the outer cover; this may expose high-voltage components.

User-level steps (if lamp is accessible behind a service panel):

• Locate the lamp access cover (often on the top or side of the cabinet on some Electrolux models).
• Remove the cover and replace the bulb with the exact type and wattage specified in the user manual.

Technician-level steps:

• If no external access, remove the outer cover to reach the cavity lamp and socket.
• Test the lamp and replace if open.
• Inspect the socket and wiring; if the lamp is good but does not light, test the lamp relay on the control board.