my baxi 105HE heats water to the taps but CH wont come on.the grundfos pump is hot and not seized.i have not used CH for a while and wonder if the boiler needs restting having already tried to reset it on the main control switch.

james, September 2013

the divertor valve is stuck thus bringing the boiler on for a short time but not allowing water to flow to the rads,its probably black sludge within the boiler that's caused it.buy a new divertor valve,it does not come with the hot water pressure differential valve, prob get 1 on ebay for less than £40

lifesagag123, October 2014