Bosch Cooktop dE: Showroom Demo Mode Is Still Switched On

What dE means

Every zone stays cold even though the glass lights up and answers your touch, and the display reads dE. That is the demonstration setting built for store floors, where shoppers can try the controls while the heating is deliberately cut off. Nothing has burned out. The cooktop was left in that mode, or was knocked into it, and it will keep refusing to heat until the proper key sequence turns it off.

Common causes of dE

Demo mode left on after the cooktop was displayed or freshly installed
Setting toggled by accident while a timer or lock was being programmed
Exit sequence entered in the wrong order, so the lock stayed active

✓ One safe check you can try

1. Switch every zone off and wait about a minute. 2. Look up the demo or showroom exit steps for your exact model in the manual; they are usually a held key combination. 3. Follow them once, in order, without improvising. 4. If dE is still showing, stop pressing keys and call us. None of this involves lifting the cooktop or touching any wiring.

! Why to stop there

Pressing random key combinations can lock the controls in a different way that is harder to undo.
Taking the unit apart to hunt for a broken part wastes money when the hardware is perfectly healthy.
Repeated wrong sequences can wipe saved preferences, so one careful attempt beats many quick ones.

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

E1Bosch Cooktop E1: Overheating Warning, or a Weak Temperature Sensor E9010Bosch Cooktop E9010: Wiring Does Not Match the Connection Diagram E7010Bosch Cooktop E7010: The Home Connect Link Has Dropped E7015Bosch Cooktop E7015: Electronics Ran Too Hot E9000Bosch Cooktop E9000 / E9010: Supply Voltage Is Outside Its Range

dEdE questions

Is my new cooktop defective if it shows dE?

Usually not. The display means the heating is switched off on purpose, a setting rather than a defect. If the manual steps do not clear it, we can check the controls during a visit and give you a written price first.

Will cutting power at the breaker clear dE?

Rarely, because the demo setting is remembered. It is worth trying only as a last step before calling. The reliable fix is the key sequence for your model.

Could this come back later?

It should not return unless the same keys are pressed again. Once the cooktop is out of demo mode it stays normal, so keep the manual page handy in case a guest or child presses the combination.