at 3-0Bar the PRV will lift and the overflow will run, sounds like the boiler nees a good service, possibly a new PRV, and certainly the air charge in the expansion vessel should be checked
www.gassaferegister.co.uk will assist you to find a registered gas service engineer near to you
www.elanar.co.uk
June 2009
howtomendit.com for free repair help, information and advice.
