Pressure in my combi Boiler?

the pressure in my boiler used to last 4-5 weeks, its starting to empty over night now any suggestions thanks. Stuart

stuart clarke
December 2010

it sounds like the pressure release valve is faulty (and now seized up?). they're normally quite cheap (less than £10) and easy to replace. If it's like mine it'll lead out from the bottom of the boiler to the outside wall via a pipe and will probably have a manual cap (red) you can turn to release pressure if too high.

Ric
November 2007