Wolf Early Induction Cooktop Code F3: rear zone sensor shorted

What F3 means

On Wolf's early induction cooktops, including the CT30I/S and CT36I/S, F3 reports that the temperature sensor on the rear cooking zone is shorted. The control reads an impossible signal from that sensor and will not run the rear zone. You will see F3, and the rear burner stays cold while others may still work. The front zone may keep working.

Common causes of F3

Shorted rear zone temperature sensor
Pinched or damaged sensor wiring
Generator board misreading the sensor

✓ One safe check you can try

1. Turn all zones off and let the surface cool. 2. Turn the unit's disconnect off for 60 seconds, then restore power. 3. Try the front zone with a magnetic pan. 4. If F3 appears again, stop using the cooktop and call us. Do not lift the glass.

! Why to stop there

A shorted sensor wire often hides under the glass.
We measure the circuit to learn whether the sensor or the wiring is the cause, then quote.
We give you the price in writing before work.
Our fix has a 30-day workmanship warranty, confirmed in writing.

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.

→Same appliance

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 E10Wolf Induction Code E10: generator 3 not responding to the control E53Wolf CT Cooktop Code E53: generator heat sink thermistor shorted 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

F3F3 questions

Is F3 about the front or rear?

F3 is the rear zone's shorted sensor. The matching front zone codes are F1 for shorted and F2 for open, so the letter and number tell us where to look.

Why does a shorted sensor stop heating?

The control cannot tell how hot the glass is, so it will not apply power. That protects the glass from overheating, which is a deliberate safety choice.

Can I keep using the front zone?

If it heats normally, it is working, but we advise a visit soon since the sensors share a control board and the problem may spread.