Baxi 105e high pressure and leaking

[MeganK]

Can you please help me. My boiler is leaking water from what seems to be an overflow pipe. The pressure is 3.5.

Last week - I bled the radiator and the pressure fell to 0 so I unscrewed something and the pressure went back up. All seemed fine until I came home today to a kitchen full of water.

I'm completely clueless with all the terminology - I've looked at previous posts and don't know what it all means (eg: filling loop / PVA) - so if you do respond, please be kind and explain it to me in idiot's terms.

Thanks

 

[superdupergasman]

make sure the filling loop, (the tap you filled it up with) is fully switched off.

 

[MeganK]

Thanks superduper

I think maybe the thread on the screw is gone as nothing is happening. Have turned off the water main and will go for a plumber tomorrow unless you can suggest anything else.