'central heating' kicks in on all settings but the 'hot water' only settings fail to fire up boiler. Is it likely to be a programmer issue or other - tank therm or motorised valve
it would be hot water start ,easy to replace buy same and connect three wire ,if motorize valve just change motor around £12 pounds,connect two wire ,try first with start on hot water tank micro switch some times jam
ltd
October 2013
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