Boiler fires up no problem for hot running water,but not for central heating.Tried reset button and the diverter valve still seems to move ok.The digital thermostat is showing that the boiler should be fired up with the flame indicator,but nothing is happening?
The heating not coming on was a gradual thing until it stop completely.

cook, April 2011

this could still be a diverter valve fault. I personally would go into the wiring centre and check the voltage to the boiler when the valve is activated, because sometimes even though the valve moves the microswitch doesnt activate. Thats what I would do but I would never recommend anyone else opens the wiring centre due to mains voltage being present. just said that to cover my backside lol

Brian Emian Plumbing & Heating, April 2011