How do you bleed a central heating radiator?

How do you identify if a radiator needs bleeding?

If a radiator isn’t heating up or is cool at the top and hot at the bottom, you’ll need to bleed the radiator.

Before you bleed any of your radiators, make sure your heating is turned off and the radiators have cooled.

What radiator do you bleed first?

Always start downstairs, always start with the radiator furthest away from your combi boiler. Once downstairs radiators have been bled, you can move upstairs and repeat the process starting with the furthest radiator from the boiler.

 Find the radiators that need bleeding

  1. Find your radiator key
  2. Make sure you turn off your central heating heat
  3. Open the valve of the radiator that needs bleeding
  4. Use a towel or paper cloth to catch drips from the valve
  5. Listen for the hiss of air as it escapes from the valve
  6. Wait for the water to come out of the bleed valve
  7. Close the valve
  8. Repeat this process on all the radiators

 Once the radiators have been bled, check the pressure of your boiler.

How do you adjust the Pressure of a central heating boiler?

How do I increase my boiler pressure?

How to increase boiler pressure is a very common question for homeowners. If you have a small leak in the systems in time the pressure of the boiler system will drop below the required level and your heating will go off. Also, if you have been bleeding your radiators by removing air in the system, this will also cause pressure to drop. At which point you will have to follow the procedure for re-pressurising the boiler

  • Locate the filling-loop and pressure gauge. The filling loop handles should be at a 90° angle to the flow of the pipe.
  • Look at the pressure gauge whilst accessing the filling loop. The correct pressure level will often be shown in green on the gauge.
  • Turn off the central heating boiler.
  • Turn both filling loop handles until they match the direction of the pipe – you should now hear water flowing.
  • Watch the pressure gauge to make sure you don’t over-pressurise the boiler. Once the correct pressure is reached, make sure the handles are fully closed by returning them to the 90° position.
  • Turn the boiler back on and check if the pressure remains steady

Benefits of Replacing Your Boiler at the start of Winter

With summertime passing and as we move into Autumn then Winter you will need to be sure your central heating is in tip-top condition. This is the time of year we place heavy demands on the system to keep us warm. Call ABC for your free home consultation

07793 076 165


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