Pressure keeps dropping on my 28i jnr boiler?

try and rule out some things......check all rads at the valves and bleed points.......and if you have a rough idea about your pressure vessel theres a small valve on the bottom of it.....press it in and if air comes out its probably not that........if water comes out you may need this vessel re-charged or re-placed......also look for water coming out the blow off valve outside? do this before ripping up floors etc

marcscooby
January 2009

Sounds like you've got a leak! Pipework, joints, under the floorboards, radiator valves, pressure relief valve, possibly the pressure vessel itself. You're going to have to find it - sooner or later! Good luck.

Richard
January 2009