So my boiler has started to increase its pressure I have drained it down back into the green zone but it is creeping up over a week or so. Expansion vessel??
Worcester 32cdi pressure
Apr 02, 2022
Last reply: 4 years ago
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That happened to my boiler.
Turned out that both ball valves iin the filling line were leaking. I fixed it by putting an extra stopcock in the line.
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