Oven clock and timer function, but interior light does not turn on when the door is opened.

Safety: Disconnect power before working on the lamp or door switch.

• 1. Test lamp manually: If your Panasonic model has a light button, press it. If the lamp still does not light, replace the bulb first.
• 2. Check door switch: Locate the door switch near the latch area. With power off, test continuity as the door is opened and closed. Replace if it does not change state.
• 3. Inspect wiring: Follow the wires from the switch to the control board and lamp holder, looking for breaks or loose connectors.
• 4. Control logic: If the switch and lamp are good, the control board may not be processing the door signal correctly, requiring board replacement.