pressure on baxi 80 eco combi

[moony]

problems with my mums boiler....

pressure dropping, checked rads bathroom leaking - fixed. re charged the boiler to 1 bar, turned heating on, shot up to 3 bar then dropped to half a bar staying there constantly. they say it drops and shoots up, also moves up when hot water is on ???

im thinking expansion vessel?

any other opinions they are getting a new boiler later this year, this one is working fine but they are topping it up a lot. i'll see what its like over next few days now ive fixed the leak on rad.

 

[oldplumber]

put some air in exp vessel if its down (depressurise system first) and see how it goes,may last until boiler needs replacing otherwise replace now as expn vessl £60 plus

 

[moony]

ok mate cheers for quick reply.