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Hmm point taken,the valve was difficult to turn with my fingers but easy with a small pair of pliers.Should it be relatively easy to turn by hand ? I wasnt aware the there was a service kit available so i guess that will be cheaper than replacing the valve itself.Thanks for the info

just to update i stripped it all down and the plastic piece that operates the valve had cracked,i repaired with epoxy resin and it seems as sound as a pound now all working if it cracks again i will replace it.

Thank you again :D

Hi Thanks for the reply,Ah so the motorised bit is seperate from the metal valve and can be purchased seperate then.I didnt see an easy way to split the 2 but the underneath is a bit inaccesable to see so are there a couple of screws or clips underneath that i cant see.I will have a go at...

Hi All,my first post so please be kind.I have a rather elderley heating system using 2 motorised 2 port satchwell valves type sd2301 i think (identified from google images).The problem im having is the radiators get very hot when i put the hot water on but not when i set the programmer to...