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Cold radiators, bled them replaced one, still cold
Posted: Wed Jan 19, 2022 8:16 pm
by dwalsh87
Hoping someone can help. We have a detached property built around 1997, there are 9 radiators, 3 of which are not heating up. I’ve bled them all, drained the system and removed and flushed one out (upstairs bedroom) lots of black sludgy water. I reattached it and still not working so I’ve replaced it with a brand new radiator, still no joy.
It’s getting water through it (bleeds fine) but no heat at all. Anyone come across anything similar?
Re: Cold radiators, bled them replaced one, still cold
Posted: Thu Jan 20, 2022 10:06 pm
by stoneyboy
Hi dwalsh87,
You have an airlock in the pipes feeding the 3 radiators. Try shutting down all working radiators and see if that will shift it.
Regards S
Re: Cold radiators, bled them replaced one, still cold
Posted: Fri Jan 21, 2022 11:22 am
by ericmark
Bleed it twice, once with lock shield off, and once with TRV off so sure both feed and return pipes free of air or blockage.
Re: Cold radiators, bled them replaced one, still cold
Posted: Fri Jan 21, 2022 5:51 pm
by dwalsh87
Thanks for the replies, I’ll give them both a try at the weekend and let you know how I get on. If I’ve already full drained the system, is it still possible there is a airlock in there somewhere?