Hi - I am having troubles with my boiler - where the hot water would come on automatically when a hot water tap was turned on it no longer does. For the past few weeks, if I switched on the heating and turned on a hot water tap, then the hot water would come on but now the hot water only comes on for a few minutes then gets cold again. Also, when I switch on the heating (slide the button on the boiler to the "on" position), it comes on (sometimes needs a bit of help and I have to push the button on/off a few times and then push the overheat lockout reset button - as sliding the button to the "on" position on its own often does not start the boiler) but only stays on a few moments then the heating stops working. No error message or hissy noise, or red light, the system just stops functioning.
I would be grateful for any advice as to what might be causing the problem. Thank you.

ahv, October 2009

hi,when i turn the button to dhw and opening the hot water tap,the water doesn't come hot and no ignition to spark but when turning to dhw and ch the hot water coming from tap.please help me to solve the problem

sam, November 2010