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Combi boiler no pressure and then high pressure

Our boiler's pressure has been at 0 for a while so we raised the pressure (which we have done before) to about 1. Now the pressure goes up to 2.5 - 3 . the boiler drips when the pressure goes up and we have bled off a rad, we have found a new filling key thingy and made sure it is all tight. Can't now get the key thingy out and is still dripping, not badly but enough to fill a suacer whilst we are out for the day.

2 Answers from MyBuilder Plumbers

Sounds like the expansion vessel has failed. You need to get a qualified person to check and advise.


Answered 5th Oct 2012

expansion vessel gone or needs a pressure


Answered 23rd Oct 2012

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