I have a Worcester 25Si Greenstar wall hung combi boiler, installed in 2005 upstairs in bathroom cupboard. Just prior to Xmas last year (2008) I noticed that the pressure had dropped to below 0.5 bar. Topped up to 1.2 bar but am losing pressure -over a two week period it drops back to

John A, February 2009

check for leaks especially around your rads and check to see if water is dripping from your pressure release pipe outside

STE, February 2009