Help - boiler pressure gauge too high

[mikcon]

This morning the boiler pressure gauge was dropping below recommended area and I stupidly added water and now the pressure in very high. It reads 2.3 and is very high on gauge.

I have tried draining off water via radiator bleeding valve but no effect.
i am really worried I have done something that will damage.

It is a Valliant eco combi boiler. Please help if you can.
Thanks, Mike

 

[Agile]

You have to drain out about 2-3 litres!

Tony

 

[ChrisOxford]

But don't use the pressure relief valve to release the excess pressure, as it may not re-seal properly afterwards.

Try using a draincock (underneath a downstairs radiator), with a length of hose attached, and when the system's cool, obviously