Radiator not heating

[kiwijbob]

hi, first post so thanks in advance.

I removed a radiator as the bracket behind had loosened, the bracket
has been replaced and I've refitted the old radiator now. I attached
the supply pipes to the rad and opened the bleed valve and then
opened the supply and return valves to let the hot water in.....now
the boiler (ideal classic ff340) is making a noice like wind howling
outside in a storm? there isn't must air coming out of the bleed
valve and the rad in the bedroom isn't heating at all now (it's cold
tonight!!), there doesn't seem to be much air pressure coming out
of any of the bleed valves in the rads like there's very low pressure?

any ideas...cheers

 

[John506]

is it a sealed system?

 

[GPlumb]

Does the feed/expansion tank have water in it? Is water entering the radiator at all?

 

[kiwijbob]

it is a sealed system, water does seem to be entering the rads
but very VERY slowly

thanks for the reply

 

[GPlumb]

Top up the pressure in the system if needed, should be 1 - 1.5 bar.