Wolf Cooktop Error Code E55

E55 indicates that the heat sink thermistor on Generator 3 has been detected in a shorted state. Generator 3 is the power board that drives one specific induction burner on the cooktop. As a safety response, the control system shuts down that burner until the fault is resolved. The remaining burners are not affected by this error.

The affected burner is shut down by the cooktop's own protection system, so it will not operate while the fault is active. The remaining burners on the cooktop can continue to be used normally. However, it is advisable to have the fault diagnosed and repaired promptly to restore full functionality and ensure all safety monitoring systems are operating correctly.

Repair costs depend on what component needs replacement. If only the thermistor or wiring harness is at fault, parts costs are relatively modest, typically in the range of a few tens of dollars plus labor. If the full Generator 3 board requires replacement, parts alone can range from several hundred dollars upward, and total repair costs including labor can be significant. Getting a diagnosis before authorizing parts replacement is the best way to control costs.

Some basic checks, such as inspecting the thermistor wiring and reseating connectors, can be performed by a knowledgeable DIYer comfortable working with appliance electronics. However, running Heatsink Test 4 requires access to the cooktop's diagnostic mode, which may require a technician. If the generator board itself needs replacement, professional service is strongly recommended due to the high-voltage components involved in induction generator boards.

Resetting the error is part of the recommended diagnostic process and may clear it if the fault was caused by a transient condition. If the thermistor or its wiring is genuinely damaged, or if the generator board has failed, the error will return after reset. Performing Heatsink Test 4 before and after a reset helps determine whether the fault is persistent or intermittent.