Hi, sounds like the domestic hot water flow switch. as far as i can remember its a paddle switch so if you bridge it out the boiler should fire up. this is obviously only a quick check to prove the switch is faulty. also check for continuity accros the flow switch terminals. make sure you don't get mixed up with the heating flow switch. if your not sure get someone to recommend a good heating engineer.
Paul
September 2006
howtomendit.com for free repair help, information and advice.
