Over time, air becomes trapped in your radiator which can block the flow of water. This means cold spots, and a not so cosy feel to your usually toasty room.

Bleeding a radiator removes the trapped air to ensure that your heating system is energy efficient.

How often do I need to bleed my radiator?

This only needs doing as and when required. So if you have cold spots when touching your radiator, or you can feel that they’re not kicking out as much heat, then it’s probably time to relieve some trapped air.


How to bleed a radiator

Only attempt to bleed your radiator if you are confident in doing so, If not, there’s no shame. Simply call our team and we’ll be happy to come out and show you how it’s done. Don’t say we didn’t warn you.


Switch off the central heating and wait for all radiators to fully cool down before you get started.

If you have a radiator key, grab hold of it… you will need to use this to open the radiator valve. (We’d advise keeping this in a safe place, close to the radiator for when you need it. Those pesky things can get lost easily). If you don’t have a radiator key, you can use a flat head screwdriver.

Towards the top of the radiator you will find the valve. Carefully attach the key and turn to open.

Have a cloth handy to catch any spills. Begin turning the key anti clockwise slowly and you will hear the gas start to escape. It is important to do let the air out slowly – once the gas has escaped, liquid will begin to spill out. When this happens, it’s time to close the valve. Turn the key (or your screwdriver, clockwise).

The final step is to check the pressure on your boiler. You will find the pressure gauge on your boiler and you can adjust the pressure by using the filling loop.

If you’re unsure that you’ve bled your radiator correctly, give us a call and we’ll walk you through it. Otherwise, enjoy the cosiness of your now, much warmer home…