F8 error, oven interior light may not work or may be stuck on.

Safety first: Disconnect mains power. The lamp area may be hot; allow cooling.

• Check lamp: Remove the glass lamp cover inside the oven (usually twists off). Inspect the bulb for a broken filament or darkened glass. Replace with a high-temperature oven bulb of the correct wattage and base type specified by Clatronic.
• Inspect lamp holder: Check for signs of arcing or burning around the lamp socket. If damaged, replace the lamp holder assembly.
• Wiring check: From the rear, inspect the lamp wiring for melted insulation or shorts to the cavity.
• Control board: If the lamp remains on or will not turn on despite a good bulb and wiring, the lamp relay or triac on the control board may be faulty. Replace the control board if necessary.