How often should I check my boiler pressure?

Check boiler pressure

You don’t need to check your boiler pressure every week, but you should check it occasionally to make sure your boiler is functioning most efficiently – this will also help you to get an idea of what is normal for your boiler.


Why does boiler pressure matter?

A boiler works by heating water which is then circulated through your pipes and radiators to keep your home warm and to provide you with hot water.

If your boiler pressure is too low, then it won’t be pushed through the system and you won’t get hot water or warm radiators. If it is too high, then it puts an unnecessary strain on the system and could break.


When should check your boiler pressure?

  1. After the summer. Before you turn your heating on for the winter you should check your boiler pressure to minimise any chances of having problems when it gets colder and you want to turn your heating on.
  2. After you bleed your radiators. Bleeding your radiators can cause the pressure in your boiler to drop so you should check your boiler pressure after doing so.
  3. If you have cold radiators or cold water – check your boiler pressure as this could be the root cause of the problems.
  4. If your boiler is making a funny noise – this could be the result of a pressure problem, so it is worth checking your gauge.


How do I check my boiler pressure?

On the front of your boiler, there should be a gauge that will tell you the boiler pressure. Water pressure varies from model to model, so you should consult your manual but as a guide, a low pressure is less than 1 bar, high pressure is above 2.75 bar and somewhere in the middle is normal (when your radiators are cold this is usually just above 1 and when they are hot it is normally just above 2). Some digital gauges will even flash with a pressure warning if you have high or low pressure.

Never open the boiler itself unless you are an expert as this can be dangerous.


What should you do if your boiler pressure is too high or low?

Read our full blog on what to do here or contact one of our experts for help.