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this thread is helpful thanks, we are thinking of buying a bungalow in mid Dorset, but might need to extend to create a new living room. an average size 2 bed is about 54sq mtrs, At a rough guess the ex would come out to about 32sq mtrs, would that need planning? then if at a later date we...

Yes I keep bleeding them,just had a big gush from the vent pipe,so it seems there is air in the system, but i am confused as to why it won'y circulate,everything is running ok

I have bleed screws on feed and return on the boiler, and a bleed screw on a pipe next to port valve and pump at highest point

thanks, It is already on 3, not much banging but all pipes still only warm. would bleeding rads again help?

Yes checked that. We have water pushing through heating and water gradually,it is slowly warming up,but boiler banging is worrying. Left it running on both progs for a while see what happens.

back again! Well tried the vent and cold feed both are ok,run system ,boiler is heating up for a few seconds then cutting out again.the minimal water it has heated gets up to the separator as before but then the water cools down. As the boiler heats up there is a lot of whooshing noises and...

Will do, will let you know the outcome. Much appreciate your help

I filled a cup from a rad so I assume the feed is working. I can dismantle the vent pipe half way down so I will take the pipe attached to the separator tomorrow and run a hose through it.See what happens. I used a solder on vent and feed with a compression T joint out going to pump with cold...

Sorry it is the syncro motor. the cold feed is ok it comes from the expansion tank, I filled the system this afternoon after I finished the pipework,so I know the tank isn't blocked.I have 5 rads above the separator. Do I need to bleed all of them again or just the nearest which is opposite the...

Thanks for all your help. This is really frustrating me now. Both isolation valves are open, they are new as well. the vent is ok, i can hear air escaping up the pipe .Water still isn't getting past the separator. I have taken solenoid off 3 way valve the worm gear is going round but one way...

The boiler seems to be shutting down a lot,Feed is still getting hot, but seems like an air lock in seperator is that possible? Pipe sequence is; feed from boiler straight into seperator, then out towards pump, straight after seperator there is a T connector which feeds the cold top up into...

Thanks for that, Switched both on now. Feed pipe from boiler is hot but seperator which soldered right next to it is cold at the moment. Also I use to hear the valve whirr as it moved across, but I can't hear it now?

I only have the rads on,trying to circulate the water quicker!

Yes and the seperator is doing it's job, i can hear the air gurgling up the vent pipe!

I flushed all the old stuff out,water is reasonably clean now, well as clean as 15 year old system can be! I have replaced,pump and put in a seperator, but still the water will not circulate.It is getting hot in the boiler,a few wobbly clunks and it shuts down.Doesn't sound like ait i think the...

Thanks That is my next job.too many bends near the pump, i am trying to straighten the runs out

No I didn't. But have done since,a few times. the system is pretty old.I have put descaler etc in and an inhibitor.

I need to replace the seperator on the CH. I took it out a few years ago because it was blocked! Since then I keep having problems with air in the system!Now I know what it is for :? I know it goes on the feed from boiler to pump,but have forgotton which way round! I know the top feed goes to...

Thanks to one and all,sounds as though I have found home :D I am having trouble typing with this white coat on and hands tied behind my back :P

Hello everyone :D Just found this site,brilliant have signed ,could be spending many a dark night on here :lol: