Worcester 28i combi boiler pressure

[juleejules]

The pressure on my combi boiler keeps dropping. I use the tap to the flexi pipe to boost, but it drops again within about 20 mins. Any ideas as to what I need to do to maintain pressure?

[The Builder]

.....seems to be a lot of this lately............ :o(
put simply.............the water's escaping somewhere...........either from the rads and pipework around the house, or within the boiler itself..........either way...............you'll need a proper heating engineer to look at it for you.............. good luck :o)

[juleejules]

Thanks for your help - thought it might be something that would require an engineer! I did have a lot of water on the work top beneath the boiler this morning but cannot locate the source so it probably is in the sealed bit of the boiler

[iansterling]

as the builder says you are loosing water check the pressure relief pipe outside to see if is dripping may be just a bad valve these can be stripped and cleaned but are only cheap so not worth cleaning. possible expansion vessel ruptured this can be cheked by removing the dust cap on the top back of the boiler and check with a bike or car pressure gauge. there maybe a little water when you check this will also proove a rupture in the vessel.
these last around 10 years depending on the water hardness. check all over for general leaks maybe in the floor and cant see it. best of luck

[gucciman]

please just call out a heating engineer and get it fixed before you destroy your heat exchanger