Indesit oven shows F09; some functions may work intermittently, and the clock resets randomly.

Safety: Disconnect the appliance from the mains before accessing any electronics.

Steps:

• 1. Power reset: Turn off the circuit breaker or unplug the cooker for at least 10–15 minutes to fully discharge the control board. Restore power and check if the F09 error clears.
• 2. Check supply stability: Ensure the cooker is on a dedicated circuit and that there are no frequent power cuts or brownouts. Consider using a surge protector if the local power supply is unstable.
• 3. Inspect control board: Access the main control module and inspect it for signs of overheating or moisture damage.
• 4. Firmware/board replacement: On most Indesit ranges, an F09 memory error requires replacement of the control board, as field reprogramming is not supported for end users.