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Well it's overdue a service so I'll call someone out. What's a fair price for a service these days?

The auto air vent at the top. Manual says it's the heat exchanger one. IMG_5380 by GrumpyBadger posted 2 Nov 2020 at 6:44 PM I hadn't mentioned it as I assumed water coming out was normal, like when you bleed a rad.

Thanks for the replies. @MeldrewsMate, if I slightly loosen the screw on the top valve, water starts coming out.

Hi, I've got a Main combi eco 25. When CH is running a lot, the pressure reaches 3 bar and the PRV seems to kick in as I can see a slow dribble from the outside pipe. I think what happens next is when CH is off for a while, the temp drops and the pressure also drops low enough so that the...