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Airlock ??

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Airlock ??
2 November 2009, 5:41 PM

george
Joined 2 Nov 2009
1 posts

I have a combi heating system,in a bungalow...with eight rads..all working fine, just one seems to work sometimes the pipe runs for three are in the loft, were there is a tee, the two to the left are fine..but the one to the right ???there are bleeds at the top of the down pipes above the right and left rads....if I bleed the valves at the right hand thr rad works for a day or so then I have to bleed again ...again it works for a day or so......Helppppppppppppppppppp#
george

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Airlock ??
5 November 2009, 8:13 PM

Mendipwalker
Joined 17 May 2009
3 posts

any leaks? need to check under floor as well as the visible bits.

Might be worth trying to light the gas you bleed out, shouldnt explode or anything too dramatic, but if it burns its hydrogen- a byproduct of corrosion. Of course you could just part drain system then add appropriate grade of Fernox corrosion inhibitor- safer but more speculative spend.

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Airlock ??
5 November 2009, 11:17 PM

Lesthehedge
Joined 18 Apr 2009
13 posts

Hi, I had a similar problem in a loft space , there was always an airlock and I found out that it was in fact a blockage in the pipe, so I turned on the central heating till the radiators were hot, then turned it off again, then went to the affected radiator and tapped the pipework near the valve with a hammer, it did the trick and has been fine ever since.

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