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YEESS! Bought new Honeywell head off the shelf from Plumbcenter. Easy to fix new one in, system checks fine. Only one small cheat with rewiring. I used a junction block to make sure I had like for like wires and because the main terminal box is virtually inaccessible (hard enough to remove...

Thanks, that's really helpful. I looked at other posts on this forum and was starting to think that it could be the motorised valve so I took the box ("head"?) off the valve. I can turn the spindle on the valve a little bit by hand (read somewhere that it's only supposed to turn about 20deg)...

Hi, first time here so please be patient.. The central heating's not working. Stelrad gas boiler fires up when hot water turned on, but does not fire up when CH thermostat calls for it. Sounded like the thermostat to me so replaced with a new one. Still same problem. Current goes to the stat...