ihave a ravenheat csi 85 condensing boiler when i run the hot water the boiler fires up for a minute then cuts out, it will do this a few times and then stop altogether until i leave it for a while. have had an engineer out to look at it and he said it was the pcb which is 180 pounds. but a friend thinks it could be the overheat thermostat, because the boiler will sometimes stay on for a bit longer if i havnt switched it on for a while.
does anyone have any ideas.
does anyone have any ideas.