flushed and flushed ahain, still no circulation!

[pliers]

Hi everyone, new to this and first post. Please can anyone explain to me why I lack circulation..... I have 3 radiators downstairs. Each one has it's own seperate in/out flow pipe coming straight down from upstairs. The rads in the hall and dinning room have always worked perfectly (even after me flushing them). However, the remaining one in the lounge has never worked deespite countless flushing. I've removed the radiator and flushed it fully, attached a hose to each valve and flushed them but still when all reconnected there is still no circulation. After reconnecting the radiator I opened the bleed valve and warm/hot water flows in, but that is it. The water then quickly goes cold due to no circulation. Help me please as I'm losing my mind over this.
Many thanks for reading, andy help or advice greatly appreciated.

 

[Jake1886]

So the lounge rad is the only one not working?

 

[tryitandsee]

Have you tried to turn off both radiators that are working and seeing if that helps to circulate water to the one that does not heat up.

 

[Slugbabydotcom]

Take the rad off and make sure you get water from both rad valves
If one doesnt let any water out [into a bowl say] you know it is blocked
If they both let water out then it's either not plumbed in right or needs balancing.... possible kinked pipe or airlock depending on system

 

[pliers]

Hi guys, thanks very much for your replies.
With the radiator off (again) i flushed it (again) in the garden flipping it over on the grass quite a few times to loosen any remaining sludge and drained some water from each valve via a hose before reconnecting. After putting the rad back on and bleeding it I switch the heating back on. It did turn luke warm but nowhere near as hot as the others. As tryitandsee kindly suggested I turned off all other rads in the house. This seems to have done the trick and cleared any blocked/airlock/imbalance that remained. It now runs as hot as the rest

 

[tryitandsee]

Just a balancing trick now, of all the rads to keep it circulating to that problem one!

 

[pliers]

I've now got all the rads turned on full and swiched the heating on and off a few times. It seems to be heating up as much as the others.....for now. Thanks again for all your suggestions.