Yep.. !! That did cross my mind but checked and re-checked..
When the boiler is on the pressure does go down.. But always comes back to high pressure when no demand from HW or CH...
I have a Baxi 130, about 5 years old..
It now keeps showing a high pressure reading, in the red and over 3 bar.
Recently i took off 2 rads for decorating and put them back on. Since then i seem to have lots of air in the system and have to constantly bleed them.
However when the boiler...