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The shower works through a mixer tap. Hot water coming from the combi boiler one side cold water the other. Unable to cool the hot water sufficiently to have a shower. Cold water coming from the header tank ...pressure quite good. There is a thermostadt to control the temperature of the...

just moved into house with a valiant combi boiler. It seems to work well. plenty of hot water. central heating working perfectly. However when I turn on the shower i am unable to control the temperature. The water is so hot that it would leave one hospitalized. I am able to have a bath...