Thankyou Kev for your prompt advice. I had the boiler serviced 10 months ago by a local trader. They replaced the circuit board...three way valve....Cylinder and boiler thermo....wired it up all wrong and nothing worked. I had an electrician sort it out in the end. Might as well have got...
Just recently my boiler has taken to not firing up when it is switched on. The piot flame is lit but not the burner. Sometimes it lights after a few minutes and sometimes not at all...leaves a smell of gas in the house.
I have cleaned some debris from the burner but it has made no...