The safety lock is active.
The safety lock is released automatically at the end of the program.
Depending on the model, you can switch off the safety lock as follows:
After the program has started, press and hold the Start/Stop button.
Press and hold the Start/Stop button until the time has elapsed.
Controls unlocked will appear in the display.
or
Press the Start/Stop button.
Select Safety lock off/deactivate and confirm with OK.
