Microwave interior light does not come on when cooking or when door is opened, but unit heats normally.

Safety first: Unplug the microwave before replacing the bulb. Avoid touching the new bulb glass with bare fingers.

• Access lamp: On many Oster models, the lamp is accessible by removing the outer cabinet or a small lamp cover.
• Inspect bulb: Check if the filament is broken or the bulb is darkened. Replace with the correct wattage and type specified by Oster.
• Check socket: Ensure the bulb is seated firmly and the socket is not burned or loose.
• If new bulb does not work: The lamp relay or wiring may be faulty and will require control board or harness repair by a technician.