How To Bleed a Radiator
Added On: 31/05/2008
2 RatingsHere is our guide on how to bleed a radiator
Cold radiators are a common problem, but quite often all they need is bleeding. Here is our guide on how to bleed a radiator, easy!
Getting your central heating system running efficiently is important, bleeding your radiators is an excellent free way to keep bills as low as possible
What you need
Radiator bleed key (may not be needed if your radiator has an adjustable nut, just use a small spanner/wrench)
Radiators that don’t work properly are a real pain, but it’s not too tricky to fix if you think it’s air in the system. Here’s how!
Air gets in there when you add new water, and can also build up due to the water pump. How do you know? The tops of radiators will often be cold, or the whole radiator. Also high level pipes may not feel hot.
Step 1
Turn of your central heating system. There’s no need to shut the whole thing off, just make sure the thermostat is turned right down so it won’t turn and start water pumping around and potentially all over your floor. It can get more air in too!
Step 2
It works best with warm water in the system (the increased water pressure pushes the air out), simply turn the valve ANTI-CLOCKWISE until you hear a hissing, which is the air escaping. You can use a cloth to catch any water that may spray out, careful, it could be hot!
Step 3
Once water starts to dribble out, tighten the nut/valve again (not too tight). Done! Try your heating, if the whole radiator now feels hot you’ve done it…
Check this video on how to bleed your radiator from Collins DIY.
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