HELP - ive added too much pressure to my boiler!

comping_cat

I noticed that the pressure in my boiler had dropped, so i added more. Problem is, i didnt realise that it added the pressure, then the needle moved, so i put far too much in, and it went to the 3 bar, when it should be between 1 and 2. This has meant water pouring out of the overflow - ive got the hot tap running now, which has stopped that - ive also turned the boiler off (whether on or off its chucking water out of the overflow) and bled the radiators, but nothing is working.
The boiler is a Vaillant, about 6 - 7 years old - and i have no problems other than my stupid error!

What can i do now - if i turn the tap off, more water comes flooding out the overflow, and the boiler makes a funny noise!

andyhop

can you drain some water from a radiator airvent

If not turn the radiator valves of and loosen the nuts on the valves to drain

You may find that there is a drain off point in the system but finding them can sometimes be a issue

arealhighlander

As above- just drain some off.

There WILL be a drain point but if you cant find it, try a radiator. Running off hot water will NOT help, that is hot water out of your HW tank, you need to drain it out of your heating loop.

Dont worry, your pipes will nt blow up at 3 bar! Its not that bad

Canucklehead

Hi

I assume it's a combi boiler?
It sounds like you haven't turned off the filling loop as you still get water out of the PRV. The reason it gets worse is the mains pressure /flow increases when you turn off the tap.
Seeing as you have lost plenty of water out of the PRV then you might as well let it go until you get down to 1 bar cold.(After turning off the filling loop)
Find the manual for the boiler and you will find the location of the PRV with a red twist top This lets water out when the pressure is below the 3 bar operating point.
You might need a new PRV if it drips after all is back to normal.
You may find there is a drain point on the boiler on the mass of pipes and connections again the manual will tell you where.

The Person Formerly Know As Corgi Guy.

comping_cat

Thank you everyone - its actually stopped over flowing on its own, and the pressure is gradually going down - i will be checking the manual tho, although hopefully i wont be so stupid again!!!