Safety first: Turn off power at the breaker before inspecting the terminal block or power connections.

Steps to check and correct:

Verify supply voltage: Have a qualified person measure the voltage at the range receptacle or terminal block. Viking ranges typically require 240V (split-phase) with proper neutral and ground.
Inspect terminal block: Remove the rear cover to access the terminal block where the power cord connects. Look for loose screws, burnt lugs, or melted insulation. Tighten connections and replace any damaged parts.
Check power cord: Inspect the range cord for cuts, burns, or crushed sections. Replace if any damage is found.
House wiring and breaker: If voltage is unstable or low, an electrician should inspect the breaker panel and branch circuit wiring.
Reset control: After correcting power issues, turn the breaker off for 5 minutes, then back on to reset the control. If F08 persists with correct voltage, the control board may be faulty.

When to call a technician: For any work involving live voltage measurements or house wiring, use a licensed electrician or appliance technician.

Viking oven display shows F08 and the clock or timer functions may be erratic; oven may not start.

Possible Causes