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Checked system again and diaphragm was the right way round Put all back together and hey presto it works...hot water and all!!!! Cant explain it really...but i do now have a small leak from one of the push connecters behind the heat exchanger :(

Sorry my fault...it was just the diaphragm

Hi All...got 1st bit of advice from forum regarding no hot water but CH ok I changed the diverter valve (over 4 hours) but still no joy... I did notice when i replaced the valve that there seemed to be no movement at the point where the relay switch makes contact with the DV shaft Also when...