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Thanks for replying Dave will do best to check this understand top unit comes off. If this is the case does it mean a new valve?. New programmer fitted not long ago by a gas company was begining to wonder if wired right. If I use valve isolator switch provided lever rises all way up to hw if I...

Hi Intermittently my heating does not heat rads have found that it seems to be the flowshare 2 sticking so I changed motor but it still happens. If I turn thermostat on tank up so it clicks on lever is driven up to water setting but if I then turn tank stat down after a period of time there...