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Cold Radiators
Posted: Mon May 04, 2009 3:09 pm
by sibaker
Hi, I de-sludged my system a couple of years ago by draining entire system, after completing project one radiator downstairs remained cold. Lived with this, but yesterday i flushed and de-sludged system again, after refilling 2 radiators remained cold (both downstairs). Drained and refilled again today to see what happened and am now up to 3 useless radiators (all downstairs) thats all my downstairs heating gone. any ideas?
Posted: Mon May 04, 2009 10:54 pm
by bd3cc
Airlock
Posted: Mon May 04, 2009 11:26 pm
by rosebery
You won't desludge by just draining. Even adding X400 for a a while then draining again won't shift it all. If you have a sludge problem you can either add X400, wait, drain, remove each rad in turn take it outside and mains flush it through with a hose pipe or just powerflush the system.
However, I think your immediate problem isn't sludge its air. You haven't cleared all the air out of the system on refilling.
Clear the airlocks and you'll most likely be OK.
Cheers
Posted: Tue May 05, 2009 5:29 am
by Steve the gas
Hi Si,
Yep, prolly an air lock/blockage. We need lots more info- boiler make/model and system type.
air lock
Posted: Tue May 05, 2009 1:50 pm
by sibaker
thanks fellas,
that seems pretty unanimous.
I might sound stupid but, how do i clear the air locks then?
Rosebury - don't worry I didn't just drain it, I did use the required cleaner. I haven't got a sludge problem, it was just supposed to be routine maintainance.
cheers
Si
Posted: Tue May 05, 2009 6:53 pm
by rosebery
I wasn't worried but you didn't say! Never mind.
Cheers