Why do I keep having to reset my boiler?

How can I tell that my boiler needs resetting?

Usually, when modern boilers need resetting they will display a fault code or begin to flash a red or green light. These signals indicate that your boiler senses a problem, which is why it has stopped working and needs to be reset.

Common underlying causes include:

• A leak in the heating system
• A pump fault
• A faulty electric part
• A blocked plate heat exchanger
• An old or worn out component
• Low pressure
• Overheating
• Insufficient air intake from the flue
• Boiler ignition problems

What is a boiler lockout?

A boiler lockout happens when your boiler shuts down due to an issue within the system. Resetting your boiler is usually the first solution for a lockout. However, you must bear in mind that this will not solve the underlying issue with the boiler, you will need assistance from a qualified engineer.

How do I reset my boiler?

The way in which you reset a boiler may vary depending on different boiler brands and models. For instance, the way in which you conduct a Worcester Bosch boiler reset may differ to the process for resetting a Vaillant boiler. You should refer to your user instructions for exact guidance.

Typically, to reset your boiler you should conduct the following steps:

2. Locate the reset button on your boiler – Look for a button that has a flame, flashing light, or a cross written through it. This button should clearly be labelled “RESET.” Refer to your boiler’s instruction manual if you have trouble finding the reset button – this should include a detailed diagram of your specific model.
3. Only press the reset button once – You may damage the control panel if you repeatedly press the button – which could lead to an expensive repair.
4. Hold the reset button for 3 seconds before releasing – You should be able to tell if your boiler has been reset properly as it will usually display a flashing green light. If a fault code is still showing or the red light continues to flash, we recommend that you contact a Gas Safe registered engineer for assistance as there may be another problem.

Getting help with your system

It is important to bear in mind that simply resetting your boiler is not a solution to the problem. There will be an underlying issue that must be uncovered, so it’s worth getting an appointment with a qualified engineer to professionally diagnose and repair the problem.

Get a repair 

If resetting your boiler becomes a regular chore and you find that you’re frequently experiencing boiler faults, it may be time to consider getting a new boiler installed.

We’re working together with BOXT, who install a range of A-rated boilers from leading brands. Their Gas Safe registered engineers could recommend and install a suitable new heating system for your home.

Get a new boiler