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@dbr
My radiators are very vocal, the tall ones especially. Tricking and dripping away. I’ve bled them all, which fixed the issue, but after a week or so they tickle again. Bleeding the tall ones fixes it for a while but it’s come back. Isn’t it a sealed system? Where does the air come from? Is my boiler farting into the pipes?
It’s a Vaillant Green iQ btw. So no one knows how it works or what the common issues are yet.