Central heating alone doen not work, needs hot water to be o

[xtrapnel]

Armo 74 - last question, I promise !

OK, so which way should I manually turn the valve - anti-clockwise or clockwise. Like I said, the valve seems to hardly move - I've read it should move 70 degrees, it's barely moving 15.

Should I get this to replace the whole assembly ?

http://www.plumbworld.co.uk/honeywell-v4073a-3-port-763-1368

THANKS !!![/url]

 

[Armo74]

I would suggest that you just need the silver box (actuator) you can buy these separately. And as it has the dimple on the box a drain down would be avoided. But would not advise changing it if you are unsure as there is wiring involved.

 

[matt1e]

Arno.

Sorry to keep plaguing you with questions ! What I can't understand is - if that silver unit (Honeywell, with the dimple on the box) has been taken off the assembly on which it sits (as I have done) and I'm operating the little valve it's meant to control manually, then surely the system should be working, if I've effectively by-passed the faulty part of the system by operating the valve myself.

But you haven't bypassed it, only in part
I'll explain,
The faulty actuator not only moves the position of the valve (which you are doing for it)
It also switches on the boiler when it needs to (which you are not)
It is also primarily controlled by the room stat,which it also sources the boiler call for heat from, when it needs to (which you are also not)
The room stat is also rendered useless, it will have no effect on anything at the mo

Matt