2. What should be boiler pressure be set at
Boilers

What should my boiler pressure be set at?

The normal operating water pressure for your boiler and central heating system is between 1.0 and 2.0 bar.

 

If the pressure drops below 1.0 bar, you need to repressurise it. On the pressure gauge on the front of your boiler, the needle will be in the centre of the green triangle on the dial.

When your boiler is heating up your hot water or radiators, the needle will go up a little, but should not go higher than about 2.5 bar. The needle should stay in the green section. If it is too high, a safety valve is fitted that will discharge water to keep the pressure at a safe level. You may need to bleed your radiators to reduce the pressure in the system.

How to repressurise your boiler

It is quite simple to top up the water pressure in your boiler. You should be able to do it yourself without having to call a heating engineer.

Related FAQs

Should I turn off my boiler in the summer?

Instead of turning off your boiler completely during the summer, when you likely have less need for heating, you can use Holiday Mode to ensure it works at a low level and prevent parts from seizing up later on in the year when you have greater need. You can also set your boiler to only heat your water and not your radiators.

Read more

Is a condensing boiler a combi boiler? 

Most modern combi boilers are condensing models. This means the heat and gases that escape through the flue pipe are captured and reused for efficiency.

Read more

Why is my external condensate pipe freezing?

Condensate pipes can freeze due to extremely low temperatures or ice building up on the pipe, which will need clearing in order to unction effectively. Insulating your pipe can prevent this from happening.

Read more

Why should I get the water in my central heating system cleaned?

It’s important to have the water in your central heating system cleaned regularly to prevent sludge buildup, which can lead to blocked pipes and ultimately, cause breakdowns. Repairs needed as a result of sludge are not covered by Baxi warranties.  

Read more
Show more