i have a digital grohe shower "very good" intermitant fault, above 36 c limit comes on will not go any higher,,,, have reset factory settings etc,,, hot supply good, was doing it before cold weather,,, cold is mains fead via pressure reducing valve,, any suggestions would be gratefull

what ever, January 2010

i would check the pressure reducing valve and turn down its surprising how little cold water a shower uses

brian, January 2010