rads not getting hot

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21 Oct 2007
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Hi just come back from my Mums. She has a vaillant turbomax 24 And quite a few of her rads are warm at bottom cold at top. I have tried bleeding them but nothing comes out.
The gauge on boiler is on zero, but boiler is working ok hot water and heating, I was told some time ago that boilers wont work when on zero. I was scared to top up boiler by filler loop as it is working.
Could anyone please give me the reasons and what I could do when i go back tomorrow especially if topping up don't work Thankyou
 
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You need to get the boiler to 1bar, if it drops again you have a problem..
 
Thanks If boiler stays at 1 bar and rads still dont get hot is there anything else i can try.
 
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Once you get the right amount of water into the system and everything bled they will get hot
 

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