Help please YPlan CH not working

[DaveyM]

Hello
I have a problem with my Yplan heating> HW is working as normal CH is not working I have drained and cleaned / refilled the system and let out all the air out the Rads until water comes out . When I call for CH with the room stat I can see the valve move (not sure if is opening all the way as I never looked at the movement when the system was fully operational ) I can feel the pump running this was only changed last year.
Any suggestions ??
Many thanks
Dave

 

[Howsie]

Sticking valve. Drain it down, take it off and check the motion.

 

[erpkid]

A Howsie says could be a sticker. If you are lucky the head might be removable without a drain down. If it is you can access the spindle to free it by gentle twisting it. Make sure the power is isolated before you remove the head. I only use Honeywell valves and on these the metal cover will have a raised nipple if it is removable.

 

[Citiheat]

What make is your motorised valve.

 

[Citiheat]

If you are unable to find the make, what does it look like ie Colour What is the lid made of, metal or plastic. If metal, are you able to see a gap between the valve body and the base plate of the metal box bit. If plastic, what shape is it?

 

[PlumbBobBob]

a picture will help in identifying the make

 

[DaveyM]

Many thanks to all the replies I have just logged on and read them , last night I decided to look at the valve it’s a Honeywell but not removable without a drain down as I could see a gasket under the actuator and once I removed one of the screws air / little water came out so I nipped it back up , so just removed the motor from its base and I could get to the leaver which activated the limit switch a manually open and closed it got the misses to fire up the heating and rads started to get warm I could see the motor itself operating so put it all back together and my CH is fully operational
Once again many thanks to all

 

[DaveyM]

Many thanks to all the replies I have just logged on and read them , last night I decided to look at the valve it’s a Honeywell but not removable without a drain down as I could see a gasket under the actuator and once I removed one of the screws air / little water came out so I nipped it back up , so just removed the motor from its base and I could get to the leaver which activated the limit switch a manually open and closed it got the misses to fire up the heating and rads started to get warm I could see the motor itself operating so put it all back together and my CH is fully operational
Once again many thanks to all
​

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[Howsie]

Great to hear.