KWC ONO touch light PRO 12.652.011.000 Instrucciones De Montaje Y Servicio página 68

Overriding the 38° C limit
(for tub and shower applications)
Turn the button until the light ring flashes orange (38° C), then press
the button and hold it down until the light ring shines red.
Release the button and turn it further to set temperatures above
38° C.