Wolf CT Induction HOT Stays On: Coil Thermistor Failure

What HOT stays on means

On earlier Wolf CT induction cooktops, including the CT30I/S, CT36I/S, CT30IU and CT36IU, HOT is meant to turn off once the glass cools. If it stays on after the unit is cool, and performance may be reduced, the official cause is an induction coil thermistor failure, covered by a 2008 service bulletin. You will see HOT lit long after cooking ended.

Common causes of HOT stays on

Induction coil thermistor failure
Coil temperature reading no longer matching the actual glass temperature
Control reacting to a wrong thermistor value by limiting power

✓ One safe check you can try

1. Turn every burner off and wait at least two hours so the glass is truly cool. 2. Switch the cooktop breaker off for a minute, then restore it. 3. Check whether HOT clears; do not cook while it stays lit. 4. If it remains, call us and leave the glass and the unit closed.

! Why to stop there

A thermistor sits under the glass next to the induction coil, which owners should never open.
Reduced power is a clue, and we confirm the cause before ordering parts.
We give you the cost in writing before starting.

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 E19Wolf CT Induction Code E19: read line failure E2Wolf CT Cooktop Code E2: generator 1 heat sink above 194F E20Wolf CT Cooktop Code E20: Shorted Generator Burner Sensor E22Wolf Induction Code E22: open burner sensor on generator 1 E3Wolf Induction Code E3: Generator 2 Heat Sink Overtemp

HOT stays onHOT stays on questions

Why is HOT still lit when the cooktop is cold?

The cooktop thinks it is hot because the coil thermistor reading is wrong. That is the failure named in the official bulletin for this model family.

Will the cooktop still cook?

Often yes, but with reduced performance, because the control limits power when it believes the glass is hot. We advise getting it checked rather than relying on it.

Is a breaker reset enough?

A reset can clear a one-time glitch. If HOT returns while the cooktop is cool, the thermistor likely needs replacing, and we will quote that in writing.