I have a Worchester 350 which is 15 years old. I keep my pressure gauge at 1bar when the boiler is off and the boiler has been running fine, recently the pressure goes up to 3bar on the gauge when the boiler is running then the pressure regulator opens and dumps water, when the boiler goes off the pressure on the gauge is now 0.5bar. Is this ok ?
Yes, check your expansion vessel - I had exactly the same problem and re-charged the vessel with a car foot pump and all is sorted. Don't know where the original air went to though................?
Johnjohn
November 2009
check your expansion vessel
sean
November 2009
your heat exstager is leting water from hot water side to heat side so replace it.
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