Viking Cooktop Error Code 5 Flashes

The 5 Flashes code on a Viking cooktop indicates a power device temperature sensor malfunction. This sensor monitors the thermal condition of the high-current switching components inside the cooktop. The unit displays this fault to prevent operation without proper thermal protection in place. It requires diagnosis of the sensor, associated wiring, and possibly the power device board.

No, you should not continue using the cooktop while the 5 Flashes fault is active. This sensor is a thermal protection component for the power electronics, and operating without it functioning correctly removes a key safety safeguard. There is a risk of component overheating if the cooktop runs without valid temperature monitoring. Discontinue use until the fault is diagnosed and repaired.

Repair costs vary depending on the failed component and local labor rates. If only the temperature sensor or wiring needs attention, costs could range from roughly $100 to $300 including parts and labor. If the power device board or main control board requires replacement, costs can range from approximately $300 to $700 or more. Viking parts tend to be on the higher end of the pricing spectrum, so obtaining a diagnostic estimate from a Viking-authorized technician is advisable before proceeding.

Some aspects of diagnosis, such as checking wiring harness connections and inspecting for visible damage, can be performed by a knowledgeable DIYer comfortable working with appliance electronics. However, replacing the temperature sensor or power device board involves working near high-voltage components and is generally recommended for a qualified appliance technician. Attempting repairs without proper knowledge of electrical safety can be hazardous.

A power reset, such as turning off the circuit breaker for one to two minutes and restoring power, may temporarily clear the fault if it was triggered by a transient condition. However, if the temperature sensor, wiring, or board has an actual hardware fault, the error will return during operation. A reset alone is not a repair and does not address the underlying problem.