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

Safety first: Unplug the microwave.

Bulb replacement (if user-accessible):

• Some Farberware models have an access panel for the bulb on the back or side. Remove the panel screws.
• Carefully remove the old bulb and install a compatible microwave-rated replacement bulb.
• Do not exceed the specified wattage and use only bulbs rated for microwave use.

If the bulb is not user-accessible or a new bulb does not fix the issue, the lamp socket or control board relay may be faulty and require professional service.