Do you cover heating?

[Les1]

Recently I had to change a motorised valve, it had shorted out & obviously shut the system down following a long term away from home. On re firing the system on the first day only one circuit was working. The next morning the system cut in with the programmed but that circuit was not working but the other 2 are. I cannot seem to get the air out of this 3rd circuit. Any ideas?

Thank you.

 

[johnjh2o]

If you are taking about a hot water heating system wit zone valves there are many different types of systems. (one pipe, two pipe, looped and some others) They are all vented differently. A picture of the boiler and piping would help.

 

[Les1]

I am talking of a Myson, Thorn Appollo 30/59 boiler feeding Central Heating 7 radiator system with programmer & one motorised valve on the system. Room thermostat etc. It is a looped system with 4 seperate loops. 2 are working but one has 2 radiators the other 1 rad. Does this help? No pictures.