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Sammy1993
Hi guys, I'm working on a combi that every time you put the hot water tap on and then switch it off again it keeps on burning, the temperature keeps on rising and makes a lot of air bubbling noses. The expansion vessel also has been dropping so I'm guessing that need re pressurising or a new vessel. There's a lot of problems with this boiler and as just wondering if you guys could help. Many thank sammy