Viking oven shows F09 and may continuously beep; oven functions may be disabled.

Safety first: Disconnect power at the breaker for at least 5 minutes before attempting any reset.

Steps to check and correct:

• Power reset: Turn off the breaker for 5–10 minutes to fully discharge the control. Restore power and see if the error clears.
• Check grounding: Inspect the ground connection at the terminal block and any ground strap to the chassis. Tighten if loose.
• Surge protection: If the error followed a storm or power outage, consider installing a surge protector for the range circuit to prevent future damage.
• Replace control board: If F09 returns immediately after reset and wiring/ground are good, the electronic oven control board is likely defective and must be replaced.

When to call a technician: Control board replacement and proper static handling are best performed by a professional technician.