Oven interior light does not turn on; an error may indicate a lamp circuit fault on some models.

Safety: Switch off power at the breaker before replacing the lamp or accessing wiring. Glass may be fragile and hot.

• 1. Replace the lamp: Remove the glass lamp cover inside the cavity (usually twists off). Replace the bulb with the exact type and wattage specified by Panasonic (often a high-temperature E14 or similar).
• 2. Test operation: Restore power and open the door or press the light button. If the new lamp does not light, continue diagnosis.
• 3. Inspect lamp holder: With power off, check the lamp socket for corrosion or heat damage. Tighten any loose connections.
• 4. Check wiring: Access the rear of the lamp assembly from the outside of the cavity. Inspect the wires and connectors back to the control board.
• 5. Control board check: If wiring and lamp holder are good, the lamp relay or triac on the control PCB may have failed. This typically requires board repair or replacement.