How do I fix my boiler that has lost pressure?

Published on April 27, 2023

How do I fix my boiler that has lost pressure?

There are a few steps you can take to troubleshoot and fix the issue, if your boiler has lost pressure. 

Check the boiler pressure gauge.

Take a look at the pressure gauge on your boiler to see if it’s below the recommended level. The ideal pressure for most boilers is between 1 and 1.5 bar. If the pressure is below this range, you’ll need to add water to the system.

How to Refill the system

 To refill the system, turn off the boiler and allow it to cool down. Locate the filling loop, which is typically a small valve or lever located near the boiler. Open the valve and allow water to flow into the system until the pressure gauge reaches the recommended level.

Bleed radiators

If the pressure drops again after refilling the system, there may be air trapped in the radiators. You can release the air by bleeding the radiators. To do this, turn off the heating system and use a radiator key to open the bleed valve on each radiator. Once the air is released, water should start to flow out. Close the valve once water starts flowing.

Call a gas safe engineer

If the above steps do not solve the issue, it’s best to call a professional plumber or heating engineer to inspect and repair the boiler. They can diagnose and fix any more serious issues that may be causing the pressure loss.

Need boiler repairs in Bolton?

Safety is the top priority when dealing with boilers. If you are not comfortable carrying out any of the above steps then it is always best to call a professional. The team at RJ Martindale will be happy to help you with any boiler problems, and we even offer same day boiler repairs if needed.

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