Why Do You Need To Bleed Your Radiators?

Bleeding your radiators

If you’ve noticed of late that your radiators have a few cold spots here and there, or they’re failing to heat up properly, it’s probably a sign that you need to bleed them… which isn’t nearly as scary as it sounds!

Bleeding your radiators simply means getting rid of any air pockets that have built up over time and which are preventing hot water from circulating efficiently around your central heating system. This inefficiency ultimately puts a lot of pressure on your boiler and will cost you more money, so it’s certainly worth taking 15 minutes or so to sort the radiators out.

To check if bleeding is necessary, listen out for any strange gurgling noises as this is an indication that you’ve got an issue on your hands. Other signs include radiators taking longer than usual to warm up, as well as cold patches at the top and warm patches at the bottom.

The process itself is very easy to carry out and anyone can do it. All you need is a radiator bleed key (or a flathead screwdriver) and a container of some kind to catch any water that comes out.

Make sure the heating is off and your radiators are cold, then place your container beneath the bleed valve and insert the bleed key. Turn it anti-clockwise (lefty loosey!) until you hear a hissing noise, which is the air starting to escape. Once water starts to come out, turn the key back clockwise to tighten the valve once again (righty tighty!).

Repeat the process on any and all other radiators that are causing you problems, then switch the heating back on and see if the situation has been resolved.

If not, you may need to drain and flush the radiators, which will clean out any magnetite buildup (dissolved metal that’s held in the water of your heating system). 

If you continue to have problems with your central heating system or your boiler, simply get in touch with the JF Heating team and we’ll come out to lend a hand.

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