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    Vaillant ecoTEC plus 831 No Hot Water Intermittently

    Hi all Got the above boiler, been working fine for last few years, its about 7 years old afaik. If we get in the shower and turn it on, it works fine initially but sometimes you hear a sort of popping noise from within the bowels of the boiler (sounds like dodgy combustion) and then the hot...
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    No bleed valve on rad to bleed it ?

    Got a radiator in upstairs bathroom thats cold at top and hot at bottom i.e. needs air removing, but there is no bleed valve on it. Its a newish radiator fitted by previous house occupants. How do you bleed a rad that has no valve?
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