I have allowed excess pressure (3.3bar) to my combi boiler which is causing system to cut out.
How can i release pressure

Spence Rankin, January 2009

At the bottom right of the boiler there is a pressure relief valve. However, it should automatically dump pressure at 3 bar - its a safety device!!
To manually operate, twist about 1/4 turn anticlockwise. If its been plumbed up properly then a drain line will have been connected taking the released water outside, no hose needed.
Reduce pressure to 1.0 bar.

HenryB, January 2009

If you can find a drain point for the system you can open it up (with a DRAIN HOSE ATTACHED OUT THE DOOR TO A DRAIN!) AND SLOWLY RELEASE WATER TILL YOUR PRESSURE READS ABOUT 2 BAR. Alternatively you can use any bleed valve on a radiator and be patient - you may have to let out a couple of pints of water!

Richard, January 2009