Bleeding radiators All aspects of plumbing questions and answers, help, tips and information

[bluenun]

I recently moved into a new home with gas fired central heating and a couple of the radiators were hot at the bottom but cold at the top.

I used a small key to let the air out of the 2 radiators and they were hot all the way up but the next day they have some more air in the again.

I have done this for a few days now.
Will this eventually stop happening? or
Is air getting into the system, if so how?

[thedoctor]

See the project on bleeding radiators and central heating systems

[marrtin]

Read this topic.

[url]https://www.diydoctor.org.uk/forums/viewtopic.php?t=7350[/url]

[bluenun]

Marrtin, thanks for the link to that thread.
I read it and it is all a lot more complicated than I had hoped :)

My pump has 3 settings and is currently on the middle setting (2).

I moved here 10 days ago and the previous owners daughter told me the last time she showed me around that one of the overflow pipes was dripping water when the heating was turned on.

Apparently a plumber came out and adjusted the pump speed (I don't know if it was up or down) and there is no drip from the overflow pipe now.


thedoctor, I searched for the project on bleeding radiators and central heating systems but could not find it, do you have a link please?

[thedoctor]

Go to the projects link at the topof this page and look for Central Heating-Bleeding the system. Doc

[bluenun]

Thanks thedoctor, I read the thread about bleeding the system and was considering having a go at it but re-read this thread that marrtin posted

https://www.diydoctor.org.uk/forums/viewtopic.php?t=7350

and turned down my pump setting for 2 to 1.
This has stopped all the gurgling and sloshing noises when the heating is turned on and also the 2 radiators that used to go cold at the top due to air entering the system stay hot all the way up now.

So I am very pleased about that.
I do get about 1 drip of water from the overflow about every 3 minutes when the heating is on though.

I would much rather the slow drip than the radiators going cold and making noises.