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Well that was easier than expected! When I took the 2 actuators off I noticed one had a rattle. When I took the cover off a spring and remains of its plastic hook fell out. Just fitted replace unit and all working fine now. Cheers. D.

Thanks for the info. Yep, got description of valves wrong. Just to confirm they aren't the two way, just open/close. Im I right in thinking the two valves that are setup in parrallel for the single zone do different jobs? If one is for the frost protection is there a way of triggering a test...

I tried to google some instructions on using them manually as I didnt want to force any thing and make it worse. I could only find Drayton ZA6 on two port valves so no wiser. I will take the motors off an go through the timer options to see what triggers what. When the motors are off Im...

Hi All. Hoping for some guidence here. Our boiler now runs constantly. Also, with just the HW on we seem to get some heat 'leaking' into a few of the rads. Ive had a problem since early spring and Ive been 'bodging' by turning off fused spur to system when we didnt want hot water. Now we need...