My Britony Combi 80 won't heat the domestic hot water to the correct temp. Tepid only. The boiler kicks in ok when I open a hot tap, but rather than staying on it cycles on and off while the water runs - any advice would be much appreciated

Joz Red, July 2007

it could be a number of things, an air pressure problem, the boiler lights but thinks it is not, so relights. just before it lights you should hear a clicking noise which is the boiler trying to light. Once it lights the clicking should stop, if it does not then the most likely fault is the pcb

gary.wright53@googlemail.com, August 2007