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Well i've had a result of sorts. After removing the motorised actuator from the valve, i noticed that regardless of the demand from the controller, the actuator moved to the heating setting so i moved the valve manually, closing off the heating and lo and behold..... hot water flows in...

Thanks for the replies lads i'm trying to upload a picture of the set up in the A/C with indications of which pipes are hot or cold. Not sure if it will help but hey ho If the return from the cylinder is the pipe from the lowest connection to the cylinder then it is cold. It disappears...

Hi John There is water to the hot taps, normal pressure etc but it is cold The sediment from the rads was black in general and thick in one rad in particular. Radiators hot up nicely when central heating on The cylinder is foam covered and difficult to access to tell if its heating...

Hi I have a problem with a lack of hot water to taps.The central heating however, appears to be working fine. I have a fully pumped system with a motorised 3 way valve heated by a Potterton profile 30 boiler. The pump is a Myson SD53 3 speed (set on number 3) In an attempt to solve...