My thermostatic concealed shower valve only gives either boiling hot water or cold water, there is no inbetween temperature? the cold is fed from mains and the hot from a combi boiler. the plumber has said that he has connected the hot to the cold inlet and the cold to the hot inlet. Would this cause the problems described? the plumber says that it makes no difference
Water Heaters - Grohe - Integrated 1/2'' Shower Thermostatic Rough-In Valve With...
Answers & Comments
Hi,
If the hot and cold are fitted the wrong way round then the thermostat on the shower unit cannot operate properly!
Most thermostatic mixer showers have a 'bi-metallic' thermostat, if you supply the hot to the cold and vice versa IT WILL NOT WORK.
It is like wearing the left shoe on the right foot and the right on the left! It doesn't work.
Re-install the hot and cold to the correct supply, and this will sort it.
I hope this helps.