Wolf Early Induction Cooktop Code F5: generator temperature sensor shorted

What F5 means

On Wolf's early induction cooktops, including the CT30I/S and CT36I/S, F5 reports a shorted temperature sensor found by the transistor check on the generator. The generator's own safety test sees a signal that cannot be real. The display shows F5, and the cooktop may stop heating. Other zones may or may not keep heating, and the code stays on the display until it is cleared.

Common causes of F5

Shorted temperature sensor in the generator circuit
Generator board failing its self-check
Damaged sensor wiring

✓ One safe check you can try

1. Turn all zones off and let the glass cool. 2. Turn the cooktop's breaker off for a full minute, then reset it. 3. Try a zone with a flat magnetic pan. 4. When F5 shows up again, stop and schedule service. Do not open it or touch the wires.

! Why to stop there

The generator is a power part, which we do not open without isolating it.
Telling a sensor problem from a board problem needs testing.
You get a written price up front.
Our repair carries a 30-day workmanship warranty, valid from the day we finish.

Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.

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Other Cooktop codes

E7Wolf Induction Cooktop Code E7: Keyboard Diode Configuration Error E8Wolf CT Induction Code E8: no communication with generator 1 E9Wolf CT Cooktop Code E9: Generator 2 Communication Error E11Wolf CT Induction Code E11: A/D failure puts the cooktop in lock mode E54Wolf CT Induction E54 Code: Thermistor Short, Not a Pan Problem E12Wolf CT Cooktop Code E12: Universal OFF Key Failure E55Wolf Induction Cooktop Code E55: shorted thermistor on the heat sink E13Wolf Induction Cooktop Code E13: OFF key error, dry the controls first

F5F5 questions

What is the transistor check?

It is a self-test the generator runs on its switching parts and its sensor. F5 means that test saw a short, so the generator reported it.

How does F5 differ from F1 and F3?

F1 and F3 name a specific front or rear zone sensor. F5 comes from the generator's own check, so it points toward the generator circuit.

Will F5 clear by itself?

It might after a reset if it was a one-time event. If it comes back, the circuit has a real issue and needs a technician.