bleeding radiators

[saabman]

I thought i had already post this but can't find it so apologises if it is a double post.

i have replace 2 radiators downstairs and am now trying to bleed the system, i started upstairs, as loads of gurgling noises, but all its going is drawing air in through the valves, i have checked the feeder tank in loft, and tried bleeding radiators whilst CH is running and switched off, but no difference, any ideas?

thanks in advance.

 

[Softus]

If no water is running out of the system, and the pump is off, then you can't be drawing air in through the rad vents.

I suggest switching off the programmer, manually opening all MZVs, opening ALL rad valves (both sides), then venting.

Also, make sure that water is leaving the F&E cistern - you can do this by shutting off the cold supply to the F&E before venting, and verifying that the cistern empties as a result of venting.

If this doesn't work, then please post back what happens when you've tried and observed all the above.