Hi, I have recently moved into a new home and have a new shower fitted. A mixer shower, brand new. As far as I can tell the inlets are connected correctly to the h and c connections. The boiler is Combi and the shower is suitable for all systems (Mira Atom ERD) I cannot get any hot water from the shower, infact, it doesn't even set the boiler demand for hot water even when I override the temperature control. Any advice would be greatly appreciated.