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Hi, thanks for the reply Im a bit confused though, i thought opening the prv was a no no because it sticks? Are you suggesting i open the prv and then top back up? There is indeed a rubbing noise in the system like trapped air, and despite the fact the water temp on boiler is pn the...

I forgot to add that the pipe from the prv was wet when i attached the bag, and theres condensation/water droplets in the flexi hose.

Hi guys, yet another issue with my combi boiler.....please help, pregnant missus and the moods not good!!! Okay, so my boilers been running fine since new pump was fitted (different story) for months.......apart from the fact that every morning it needs topping up after the low pressure...