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Hi Softus Thanks for the reply mate I Really dont know whats up with this boiler. its driving me crazy What can i do to sort the expansion vessel out myself? Your reply will be gratefully appreaciated mate. I had a engineer out and he said that it could be the Pressure relief...

Hi everyone, I have a Worcester Bosch 26 cdi xtra Boiler. These problems have been driving me mad. When i pressure the system to 1.5 or 2 bar and turn the heating on it goes to 3.5 bar of pressure and then0 when i turn it off it goes straight back to 0.5 or zero in a matter of hours. I...