Hi looking for some advice - before I cut a hole in the wall to replace my shower valve.
The shower was fitted about 6 yrs ago and has worked fine. It is feed from cold water tank & hot water tank to twin impellar pump (separate hot & cold in and out).
Recently the shower has started to run cold midway through a shower, ie start of warm and goes cold after a while. There's still plenty of hot water - checked nearby taps.
Been in roofspace tonight and, after the shower started to run cold checked the output feeds from pump - still hot both in and out of the pump.
That leads me to think a faulty valve? Unfortunately it is buried in the wall so will need to cut away to replace/repair or even undo the connections :(
Only other bit that makes me wonder in it di something similar about a year ago and then seemed to correct itself.
Good chance the valve is scaled up causing it to stick. Turn the shower on and move the temperature control from fully cold to fully hot many times - this may free the internals. If this doesn't work you may be able to fit a new cartridge - depends on the make and model.
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