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Thanks for that Chris. I looked at the lever which was limp and apparently not moving anything. I took the unit apart, removed synchron, to discover that the pin locating into the actual valve was very stiff. I think this stiffness had caused the assembly to jump out of its cog positions. Once...

Hi The boiler is a Gas Potterton/Myson I believe No changes have been made to the system recently I think this is a new problem, but by that I mean that I just noticed it. When the CH is off but the HW is on, this causes the rads to heat up also. I hope this additional information is of...

HI there I hope someone can point me in the right direction. When my Thermostat CH is off but my HW is on, this causes the rads to come on also. I think it is the three way valve close to the pump. Am I on the right track? Is it likely that I can just replace the syncron motor in this...