Wolf Cooktop Error Code E22

Error code E22 on a Wolf cooktop indicates that the temperature sensor for Generator 1 burner (designated F, FR, or FC) has developed an open circuit condition. The generator board monitors the sensor's analog-to-digital (A/D) conversion value continuously during operation. When this A/D value climbs beyond the defined error threshold, the control interprets the reading as an open sensor circuit rather than a valid temperature signal. As a safety measure, the affected burner shuts down immediately to prevent uncontrolled heating without valid temperature feedback.

The temperature sensor on the generator burner is a critical feedback component. It provides real-time thermal data to the generator board so the control circuit can regulate the burner's output. An open circuit in this sensor loop means the board is receiving no valid signal, which could be caused by a broken sensor element, a severed or corroded wire harness connection, or internal failure within the generator board's sensing circuitry itself.

Because the first and primary diagnostic step is to replace the affected generator board, the fault is most commonly traced to the board itself rather than an external wiring issue. However, technicians should inspect the sensor wiring and connector integrity before condemning the board, as a damaged lead or loose connector can produce an identical open-circuit fault condition. The burner will remain disabled until the fault is resolved and the error is cleared.