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Thanks oldbutnotdead I think this is a dumb one as it keeps running regardless and the water eventually gets cold. Can't justify running the boiler constantly to get instant hot water a once or twice a day at the far end of the house. thanks again Andy

thanks DP. Well now i'm really confused about what's been put in this set up. It does connect to the side of the cylinder 2/3 of the way up (see pic) and the eipe then goes off around the house. Hot water does come through quicker when the valve to it is opened up and its running. We don't have...

Thanks poles. I was thinking that might be an option.

Thanks for the reply Ian. Obviously I have an odd /bad set up then. It definitely takes water from the hot water cylinder and sends to the taps, see photo.

Hi everyone We inherited a heating system in our house with a grundfos UPM3 AUTO L which is connected to the hot water cylinder to push hot water around the house. But I have no clue if it's set correctly or how it works. The valve to it had been turned off by the previous owners. Hot water...

Thanks guys. Why don't these things happen in the spring or summer!

Hi guys, Not been on here for a few years and can't seem to find my old login unfortunately. Anyway... I have an Ariston microsystem 21rffi that's stopped working. The orange overheat / reset button gets activated after 5 seconds of the ignition firing up and the gas igniting. The pump sounds...