I have a vented heating system with a back boiler,I have replaced the main pump and isolation valves after draining system,I turned off electricity to replace pump.i have refitted pump and new isolation valves(other didn't seal ) and refilled system and bled radiators however when I select heating or water or even both back boiler will not fire up
I know the three way valve is operating ,am I right in thinking the micro switches in that is what kicks up the boiler,and pilot light on in boiler
Any help would be appreciated
I know the three way valve is operating ,am I right in thinking the micro switches in that is what kicks up the boiler,and pilot light on in boiler
Any help would be appreciated