Wolf Cooktop Error Code F6

The F6 error code on a Wolf cooktop indicates an open temperature sensor condition that is being used as a diagnostic check on the transistors within the induction or electric generator assembly. An "open" sensor reading means the control board is detecting infinite or out-of-range resistance from the temperature sensor circuit, which is used to monitor and protect the transistors (typically IGBTs in induction cooktops) from thermal damage. When the sensor circuit is open, the board cannot confirm safe operating temperatures for the power transistors, so it faults out rather than risk component damage.

The generator assembly is the core power electronics unit that drives the cooktop's heating elements. It houses the transistors and relies on a closely integrated temperature sensor to regulate operation. If the sensor lead becomes disconnected, corrodes, or the sensor itself fails to open circuit, the generator cannot validate transistor temperatures. This creates the F6 fault regardless of whether the transistors themselves are healthy.

The first diagnostic steps are to inspect all wiring connections between the temperature sensor and the generator board, looking for loose terminals, corrosion, or broken wires. If connections are secure and continuity testing of the sensor circuit confirms an open condition, the generator assembly will require replacement. Because this fault directly involves high-voltage power transistor protection circuitry, repair should be approached with appropriate caution and the unit powered down completely before any inspection.