Why is my Worcester boiler losing pressure but no leak?

Why might a Worcester boiler lose pressure?

If your Worcester boiler is losing pressure there’s a problem with either:

• The boiler
• The system

To find out where the problem is located, you’ll need to hire a qualified boiler engineer.

Read our guide to find out more about what to do if your boiler is losing pressure.

How to find the reason for a Worcester boiler losing pressure

A boiler engineer will visit your property to inspect the boiler and heating system.

To find the reason for the dropping pressure they will isolate the boiler overnight on the flow and return pipes with no demand.

If they find that the pressure has dropped overnight, it’s a problem with the boiler. If the pressure has remained stable, then it’s a problem with the system.

What is the cause of the problem?

Once a boiler engineer has found out where the problem is located, they can then identify what needs to be fixed.

The most common causes of a Worcester boiler losing pressure are:

• A faulty heat exchanger
• The expansion vessel needs recharging
• A blocked condenser trap
• Air trapped in the system

If you experience any problems with a Worcester boiler, you must contact a qualified Gas Safe boiler engineer. Trying to fix your boiler should never be attempted as a DIY job. To find qualified Checkatrade-approved boiler engineers in your area, enter your postcode into the box below.