Wolf Cooktop Code E50: heatsink thermistor open or key held down

What E50 means

E50 has different meanings on two Wolf platforms. On CT electric cooktops (CTE and CTE-2), such as the CT30E/S and CT36EU, it means the heatsink thermistor reads open, so the control cannot monitor its own temperature. On touchscreen CI induction cooktops like the CI30460T/S, it means a continuous key push on the master, as if a touch is held down.

Common causes of E50

CT electric: open heatsink thermistor circuit
Touchscreen CI: a stuck or constantly sensed key press
Control board or touch panel needing attention

✓ One safe check you can try

1. Turn everything off and let the glass cool. 2. Wipe the touch area with a dry cloth and remove anything resting on the controls, such as pots, towels or spills. 3. Turn the cooktop's breaker switch off for one minute, then reset it. 4. If E50 comes back, stop and arrange a technician.

! Why to stop there

Two different problems share this code, and the right repair depends on your model.
The thermistor sits inside the unit, where it cannot be reached safely at home.
You get a written estimate first.
Our repair comes with a 30-day workmanship warranty.

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

E50E50 questions

Why would a clean screen still show a key push?

Moisture, a worn touch layer, or a failing panel can register a press that is not there. If wiping fails to help, the touch panel or board needs a technician.

Does E50 on an older CT cooktop mean it will overheat?

The control cannot read its heatsink temperature, so it may limit or stop heating to protect itself. That is why the cooktop may seem to shut down.

Can I tell which meaning I have?

Yes. CT30E/S and CT36E/S style cooktops use the heatsink meaning, while CI30460T/S and CI36560T/S touchscreen models use the key-push meaning. Your model label on the data plate settles it.