how do i get the system to kick in or do i need to build up the pressure if so how do i do that ? please helpHave changed a radiator on a back boiler system but boiler wont kick in to heat them up?All you should need to do is refill and bleed for now.(add inhibitor later)
Your problem is elsewhere.
Is the boiler lit?
Is the thermostat turned up enough?
Is the pump running?Have changed a radiator on a back boiler system but boiler wont kick in to heat them up?You have air trapped in the radiator. There is a bleed valve on the radiator. Open this and you will hear the air hissing out. Let it continue until water bubbles out and then close. this should do the trick. There might also be air in other pipes to the system but if the radiator is clear it should rise to the feed and expansion tank in the loft. DO NOT fire up until the radiator is purged of the air.Have changed a radiator on a back boiler system but boiler wont kick in to heat them up?Check that the pilot light is on. and boiler stat is set high. Check that electrics for boiler are on. Follow makers instructions on the pull off panel under the gas fire.Have changed a radiator on a back boiler system but boiler wont kick in to heat them up?If you drained the system, then you either have not filled the hot water side of the system, (by opening the diverter valve manually, or you havn't bled the system properly, you may also have the timer, thermostat or room thermostat off, not turned power on, you bleed with the heating off, and you bleed rads from the bottom rooms first, working to upstairs. I think you are going to find this will cost you more than getting an engineer would have done in the first place.
