Oven display shows F15 and interior light does not work or stays on permanently.

Safety first: Disconnect power before replacing the lamp or touching the lamp holder.

• Replace the bulb: Remove the glass cover over the oven lamp (usually by twisting counterclockwise). Replace the bulb with the correct high-temperature Gorenje-compatible oven lamp (e.g., 25–40 W, heat-resistant).
• Inspect lamp holder: Check for heat damage, cracks, or burned contacts. Replace the lamp holder if damaged.
• Check wiring: Inspect the wires leading to the lamp holder for signs of shorting to the chassis. Repair or replace as needed.
• Control board relay: If the lamp stays on constantly or never turns on despite a good bulb and wiring, the light relay on the control board may be stuck. This typically requires control board repair or replacement.