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sorry about caps lock :oops:

1 SORRY IF U THINK I'M SHOUTING (COS I'M NOT) 2 I AGREE, AND I MISS MORE THAN MOST. 3 HOW DO I CHECK THAT PUMP IS NOT DRAWING AIR DOWN THE VENT ? 4 I SEE WHAT U ARE SAYING, BUT WHEN I DRAIN THE SYSTEM DOWN, IT APPEARS TO REFILL WITHOUT ANY PROBLEM AND ALL RADIATORS FILL UP OK ! THANKS

BY THE HEAD TANK I ASSUME YOU MEAN THE EXPANSION TANK IN THE LOFT ? IF SO, I CHECKED THIS LAST NIGHT AND FOUND BALLCOCK TO BE OPERATING OK, AND EXPANSION PIPE IS CLEAR APROX 2" ABOVE WATER LEVEL.

problem seems to have occurred since heating turned back on after this summer.

Thanks for your advice. Will try balancing first and then deal with air problem. Thanks

Can anyone suggest why 2 or 3 of my rads are not getting hot? The feed to a downstairs rad is hot but the rad is not warming up, I have checked that the feed valve is fully open and have opened up the return valve ? Another radiator upstairs is also cold. I have removed this rad, flushed it...