Anyone know a good plumber/ boiler repair ?

[The Terminator]

My combi boiler is losing pressure ,no sign of any leaks around the rads. Bosche Woscester 4 years old.
Cheers
Paul

Aintree , Liverpool area.

Edited by The Terminator on Wednesday 9th April 20:25

[The Terminator]

chadders74 said:

I've had this, if you top it up to the usual place then turn on the heating does it go even higher? Then drop down again until you have to top it up again.

I think it's the expansion vessel, could do it yourself but I got the boiler man in. Literally foot pump it up to the proper level, it's got the same valve as a bicycle tyre.

Check the pipe outside if that's dripping could be the pressure relief (release?) valve being faulty.

Yes it does that but also it loses pressure over a few hours when the heating is not even turned on .