radiator problem, air lock

[matt. m]

Hi hope someone can help. I have one radiator that does not heat up beyond half way. I have tied balancing, bleeding and have drained the radiator down. As I did this just at the end came the hissing of air. I then refilled the radiator but have got exactly the same problem. Also, when I open the bleed screw, nothing happens, no air or water comes out. it appears that I have got an air lock in the radiator.

This problem has only occurred since I drained the CH system to do some decorating.

Any thoughts?

thanks

 

[kevplumb]

close both valves remove bleed screw and stick a pin in the hole

 

[matt. m]

Fantastic!!!!

I thought initially you were pulling my leg, but I've gone and burst that air lock.

thanks

Matt

 

[wilhelm]

blimey kev that was a good guess.
i deploy the same tchnique (the pin) when faultfinding. ..
parts catalogue open ...shut eyes ...and .......easy.

 

[kevplumb]