Oven display shows F08 and the oven may overheat or not regulate temperature correctly.

Safety: Disconnect mains power. An oven that overheats is a fire hazard; do not continue using it until repaired.

• Observe behavior: If the oven continues heating even after being switched off, suspect a stuck relay or triac.
• Access control board: Remove the top or rear panel to expose the main PCB. Identify the relays controlling the heating elements (often labeled on the board).
• Inspect for damage: Look for heat discoloration, cracked relay cases, or burnt solder joints. Any sign of welding or burning indicates replacement is needed.
• Board replacement: On most Hotpoint-Ariston models, relays are not serviced separately. Replace the entire electronic control board with the correct part number, transferring any mounting hardware and reconnecting all harnesses.
• Functional test: After reassembly, run the oven at a moderate temperature and verify that it cycles on and off correctly and that F08 does not reappear.