Hello kevplumb/doitall, yes it has a dimple on the top, I think I can just remover the cover to get at the fixing screws, remove & then bang a replacement on & see if that will turn the valve
Is it worth swapping out the Honeywell motorised unit first before changing the 3 way valve? Or you think valve has seized which has killed the motor?
Thanks
Thanks for reply.
No the valve doesn't appear to make any noise, neither does the motor.
If I turn the cylinder stat up the pump starts but nothing from the valve/motor appears to be going on.
After reading some other posts regarding these motorised valve controls, I have checked mine & there is no resistance on the slider switch (auto/manual) so it moves freely between the two settings if I push the slider, so I think maybe it has broken?? I think I can try replacing the motor...
Well it's getting cooler & I've discovered the central heating is not working. I thought it might be the pump (Grundfos 15-50) as it was old & v noisy, so I replaced that Saturday which turned out to be a saga with leaking valves & unable to find drain point for central heating :-( Anyway pump...