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Wocester 240 boiler?

Why do we have to keep adding water to our Worcester 240 boiler. The pressure goes way up to 3 bar when the boiler is working. When it turns off the pressure drops and we have to add water to prevent the pilot from going off.
Dan Nickel, March 2006
Suspect flat expansion vesel or blockage to expansion vessel.

HTH

Andy the gas man, March 2006
link Click here to see other fixes for Worcester 240.