when the heating is on the boiler normally runs at 1 bar pressure but now for some reason when the heating is on it is running at 2.5 bar pressure is there a problem?
I have a worcester boiler 24 green star and the condensation pipe froze up and the boiler stopped working. I have defrosted the boiler dryed out the in side and the boiler will not fire up
Derek
December 2010
sounds like the expansion vessel has either lost its pre-charge pressure, or the bladder in it has split (if latter, you'll need a new vessel sorry).
Take the dust cap off the vessel's schreider valve (similar to a car tyre cap/valve) and press the pin in gently. If you get air, fine. If you get water, the bladder is split.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix home heating systems.