Help!! Radiators hot but no Hot Water!!

[seco services]

turn your hw/heating off at programmer.
then turn it off on the wall.

then see what the lever on the valve is like loose or stiff to push across.

 

[SallyC]

It still switches across fairly smoothly - how stiff is it meant to be?

 

[seco services]

does it feel as if its not connected to anything or can you feel resistance when you push it.

when you push it over does it come back on its own

 

[SallyC]

It does feel like it is connected to something, there is slight resistance. Not so much as I would regards it as stiff or needing any force to push accross. But enough to presume it wouldn't just fall accross if it was tilted or something if that makes sense.

What happens now?

 

[seco services]

turn the mains power back on.
and put just hw on again at programmer.

it sounds like the valve is sticking in heating only position.

 

[SallyC]

Ok if thats the case, how do I stop it from sticking, and enable it to be able to switch between the two please?

Thanks for your help with all this by the way

 

[seco services]

if your valve is faulty need a new valve drain the system and replace.

see what pipe gets hot with the hw on rads or cylinder.

 

[SallyC]

Still the same, the cylinder pipe stays cold
Im assuming I need a new valve then do I ?
Anything else I can try? Is it possible its an air block as the radiators didnt work till I bleed the system?

 

[SallyC]

Ok Ive just given the cold pipe from the valve to the cylinder a tap and it is now hot !?! Go figure!! Tough there still does not seem to be any hot water coming through the taps....grrrrr....

 

[seco services]

give the cylinder time to heat up.

 

[SallyC]

Yay I have hot water!! Not quite sure how, I tapped a pipe and hey presto 30 minutes later - there it was!!

Thanks for all your help guys