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Why do two of my radiators need bleeding so much?

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Hi,

 

Two of the radiators in my house (upstairs landing and bathroom) seem to go cold on the top half quite often. I seem to have to bleed them every week or two. All the other radiators in the house are fine.

 

Any ideas why these two keep doing this?

 

Thanks

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At a guess you have a leak , might only be a drip , but thats all it takes. It could be anywhere on the system but obviously the upstairs rads loose water first.

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What type of boiler do you have?

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Our radiators was the same. We was constantly having to bleed them and then the heating system started to bang and then we ended up with 2 tiny leaks in the pipes downstairs and one of them has ruined my laminate floor :rant: but the gas guy comes out tightens the pipes where the leak was and apparently turns something down at the tank and now everything is meant to work fine. I will let you know if it does in afew days lol

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Or it may be heavy corrosion if its an old system. When you bleed the rads u may smell a type of 'eggy' smell. This is hydrogen sulphide produced from a corroding system. Its also more prevelant in a conventional system that has a hot water cylinder, F&E tank as air can be drawn in more easily than a sealed combi.

 

So if u have a header tank you could add some Sentinel X400 to break down the ccorrsion and a couple days later add some sentinel x100 inhibitor. Even better would be to add x400, leave few days, drain down, refill and bleed all rads, then add inhibitor.

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Sorry for the delay. Found a leak on radiator installed last year. Only small but room next to ones with problems. Guy coming next week to fix, hopefully should fix it.

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