Hi Guys,
Been reading through some posts and am impressed at all the helpful people here so was hoping someone might be able to help.
I've just moved three radiators in our house due to a new kitchen and bathroom going in. I drained the system down to do the work, had no problems with the replumbing (i.e. didn't get more water coming out when I distrubed joints etc so think the whole system was empty) refilled it, fired up the system and, although all radiators filled up and bled OK, they didn't get hot. The hot water works fine though. Piping around the pump and tank gets too hot to touch. 3 - port valve works fine.
I thought it must be an air lock, so tried blasting some water through the system back to the tank a couple of times but that didn't help. Then I drained down the system via 2 seperate drain valves, but when I went to open the vents in the downstairs radiators all those except for the ones that I was draining from were still full of water ( I opened all vents on upstairs radiators). I then broke a joint on every radaitor and emptied them all, including both feed and return pipes. I then refilled the system but still no circulation although, again, it gets hot round the pump.
Pumps appears to be working - certainly making a noise - but I was wondering if this could be the motor humming, even if the spindle isn't turning. After draining, I can hear rushing water though? I also turned the disc I could feel (but can't see - space is tight in the airing cupboard!) on the side of the pump and it seemed to fire up having been silent.
I replaced radiators virtually like for like in terms of heat output, although the two downstairs ones are ladders rather than traditional panel ones (trying to free up wall space for cupboards).
The system is 10mm micro bore, I guess off manifolds but haven't lifted boards upstairs to check. The house is 5 years old, although we are only just moving in right now so am not too familiar with the system.
I guess my gut feel is that the problem is with the pump, but as everything was working OK before I started the work was thinking it might be some sort of blockage? If it is a blockage or airlock is there anything else I should be doing to try and fix it? Final thing, if I drain water off from the downstairs radiators with the system on I can get warm water to the outlet, but then it just cools down, so looks like it isn't circulating?
Any help would be much appreciated - we are due to move in this weekend and with a 2 year old and a 3 month old baby the missus is keen that the heating is working!
Been reading through some posts and am impressed at all the helpful people here so was hoping someone might be able to help.
I've just moved three radiators in our house due to a new kitchen and bathroom going in. I drained the system down to do the work, had no problems with the replumbing (i.e. didn't get more water coming out when I distrubed joints etc so think the whole system was empty) refilled it, fired up the system and, although all radiators filled up and bled OK, they didn't get hot. The hot water works fine though. Piping around the pump and tank gets too hot to touch. 3 - port valve works fine.
I thought it must be an air lock, so tried blasting some water through the system back to the tank a couple of times but that didn't help. Then I drained down the system via 2 seperate drain valves, but when I went to open the vents in the downstairs radiators all those except for the ones that I was draining from were still full of water ( I opened all vents on upstairs radiators). I then broke a joint on every radaitor and emptied them all, including both feed and return pipes. I then refilled the system but still no circulation although, again, it gets hot round the pump.
Pumps appears to be working - certainly making a noise - but I was wondering if this could be the motor humming, even if the spindle isn't turning. After draining, I can hear rushing water though? I also turned the disc I could feel (but can't see - space is tight in the airing cupboard!) on the side of the pump and it seemed to fire up having been silent.
I replaced radiators virtually like for like in terms of heat output, although the two downstairs ones are ladders rather than traditional panel ones (trying to free up wall space for cupboards).
The system is 10mm micro bore, I guess off manifolds but haven't lifted boards upstairs to check. The house is 5 years old, although we are only just moving in right now so am not too familiar with the system.
I guess my gut feel is that the problem is with the pump, but as everything was working OK before I started the work was thinking it might be some sort of blockage? If it is a blockage or airlock is there anything else I should be doing to try and fix it? Final thing, if I drain water off from the downstairs radiators with the system on I can get warm water to the outlet, but then it just cools down, so looks like it isn't circulating?
Any help would be much appreciated - we are due to move in this weekend and with a 2 year old and a 3 month old baby the missus is keen that the heating is working!
