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no hot water to demestic sully?

boiler dose not ignight for domestic water supply but sentrel heating works. but if you turn hot tap on burners go out
colin megson, August 2009
Combi boilers give priority to hot water. Sounds like boiler is detecting your putting the hot tap on but doesn't fire, there could be many reasons why. Could be pcb..???? Best call heating engineer. Good luck.

mark scott, August 2009