Bleeding a radiator..

HH62

I was given a link by a very helpful poster, that showed me how to do this as I didn't have a clue. But one question I don't have the answer to is this - do I need to have the entire system switched off and the water completely cool before I do it?

Lady_Inversneckie

Hi,

I always have my heating on when I am bleeding the radiators.

Have a piece of kitchen roll ready as well as you turn the key each time.

Cheers

benjdr

your CH should of OFF before bleeding.
http://www.ultimatehandyman.co.uk/bleeding_a_radiator.htm

nimbo

arrrgh my fella used to say that you do a more effective job if the heating is on.... (mine is not ro reason why)

and as long as the heatings not on too high it doesn't even burn haha

EliteHeat

You should never have the heating on when bleeding radiators.

Lady_Inversneckie

OOps, You learn something new every day :-)

benjdr

EliteHeat wrote: »

You should never have the heating on when bleeding radiators.

EliteHeat,

Awesome picture on your website! haha

philgee

Didn't know that, but guess it makes sense...

Blackpool_Saver

blimey i always do....

totalsolutions

I do, - how do you know the rads are getting hotter at the top then? I only bleed (them) while touching them when they are hot....I have a combi, that has a device built to let out any air in the system, air can be introduced when topping up the system anyway.

mikey72

The heating should be off to stop air being sucked into the system by the pump.
On some systems , the pump is actually at the end of the radiator flow, not the start, so it pulls water through the radiators, then pumps into the boiler and round again. So if the pump is powerful enough, and it's happened on some systems I know off, when you crack the bleed valve air will be drawn into the system, rather then out.
Water temperature doesn't matter, only to your fingers.