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Hello: Sorry to bother everyone again :cry: I asked a question a while ago about how to deal with air getting into my heating system. The solution recommended here and by others was to convert it to a pressurised system. This I have now done - BUT still the problem persists. System...

I have a big problem of air (or some other gas?) in the central heating. Need to vent radiators every day. Noise of bubbles moving around in the pipes all the time. A bit of history: Problem started after the system was cleansed with an acidic cleaner (Fernox DS40) Has been drained...

I Recently cleaned my system using "Fernox DS40" (plus neutraliser). Drained + flushed 4 times as per instructions, then refilled + Fernox protector added. Ever since, it continually fills with air and needs venting every day. Only happens when the boiler is hot, no problem when the stat is...