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Hello, I have an old Vaillant combi - not sure of the exact model or year, but I believe it's an aquaPLUS installed sometime early 2000s - that is puzzling me. Three times now it has given me the "low pressure" F.22 fault code. October: First time; called an engineer who came out, added water...

Hello, I'm new to the forum and have been having a read, but I think I don't know quite enough to be able to find the right threads to answer my questions. So I'm posting here. :) I've recently bought my first house, and now I'm paranoid about everything, since it's started to sink in that...