Air regularly in radiators

[Gilbo]

Hi All,

I have a problem in my 8 year old house.

One of the radiators is totally cold and I've tried bleeding it several times (with the whole system turned off). I get cold water flowing through it accompanied by the hissing of air. I must have emptied a few litres of water out but still no joy. I've replenished the water in the system by using the balancing tap in the airing cupboard.

I've also got a few radiators that are partially warm (cold at bottom) and also have air with water when I bleed them.

I am not a DIY expert and have tried several things but to no avail

Any ideas?

Thanks
Gilbo

 

[John506]

I would clean the system, radiators cold at the bottom is a sign of sludge. The reaction of the metals and the oxygen in the water can also produce a gas inside the radiators/system, could be the air you are forever bleeding.

Is it properly balanced? (plenty of posts on the forum about this)

 

[bengasman]

defo corrosion

 

[Gilbo]

Thanks to you both for your comments and apologies for taking so long to reply.

I'll try John's suggestion and post feedback on here

Thanks again
Gilbo