Yep we've got water and no it doesn't fire up it makes the noises but no ignition. But if I turn it off at the mains for a few seconds then on again it ignites but cuts out just as the rads starts to warm up
Just got back from hols last night. Turned on the heating and have been freezing since. Pump running and if I turn heating up to 28 on thermometer stat it runs for a while if I turn it of and on again at the mains.
Basically the bar on the expansion vessel is under 1 but if I get it to run...