leak in combi boiler


Postby muppet » Sun Nov 11, 2007 10:49 pm

the pressure on my combi boiler drops from 1 to 0 in 2 hours, its been doing this for a while now, does this mean i have a leak? if i do have a leak i have concrete floors how do i find it? could i connect the flow and return pipes from the boiler together and cut the cental heating out all together so that i can use the hot water, or do i need to add the radiators, thanks Geoff
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Postby The Heating Doctor » Mon Nov 12, 2007 4:22 pm

could be the expansion vessel is needing replaced.
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Postby htg engineer » Mon Nov 12, 2007 6:59 pm

check pressure relief discharge pipe make sure this isn't passing. Also check pressure gauge when heating is on, if on 1.0 when cold should not go any higher that 1.5 - 2.0 bar when hot. If it does it may be a fault with expansion vessel.
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