leak in combi boiler Help and information on all topics relating to your central heating, air conditioning and ventilation issues.

[muppet]

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

[The Heating Doctor]

could be the expansion vessel is needing replaced.

[htg engineer]

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.