How to Reset a Baxi Boiler: Step-by-Step Guide

08/10/202426/12/2025

A complete guide to reset a Baxi boiler. If your Baxi boiler is showing an error code or has locked out, resetting it can often resolve the issue. Resetting is a straightforward process that you can do yourself in most cases. This guide will take you through the steps to safely reset your Baxi boiler and get your central heating system back to normal.

Image to explain how to reset a Baxi boiler

Why You Might Need to Reset Your Baxi Boiler

Boilers typically lock out or require a reset when they detect issues such as:

Low pressure: If your boiler’s pressure drops below the optimal range.
Overheating: The boiler shuts down as a safety measure to avoid damage.
Airlocks or system errors: A temporary error may cause the boiler to stop working.

How to Reset a Baxi Boiler

Time needed: 4 minutes

Steps to Reset a Baxi Boiler

Find the reset control
Most Baxi boilers have a reset button on the front panel. However, some models may have a knob instead of a button.
Check the error code
If your boiler shows an error code (such as E119 for low pressure), take note of it. This will help you understand the issue, and you may need to adjust the pressure before resetting.
Turn off the boiler
Switch the boiler off to safely reset it without risk of damaging internal components.
Press the reset button or turn the knob
Hold the reset button for 3 to 5 seconds. If your model has a knob, turn it to “R.” Hold it there for a few seconds, then release it. This initiates the reset process.
Wait for the boiler to restart
After resetting, the boiler will go through a start-up sequence. This process may take a few minutes.
Check the pressure gauge
After the boiler is back on, make sure the water pressure is in the right range. This is usually between 1 and 1.5 bar. If the pressure is low, you may need to repressurise the system before the reset takes full effect.

What to Do if Resetting Doesn’t Work

If the reset doesn’t solve the problem, or if the error code reappears:

Check the pressure: If the pressure is too low or too high, adjust it accordingly.
Consult the manual: Use your Baxi boiler’s user manual to decode any persistent error messages.
Call a professional: If you still have problems after trying these steps, it may be time to call a qualified heating engineer. They can help assess the situation.

Final Tips

Regularly check your boiler’s pressure to avoid the need for frequent resets.
If your boiler often locks out, think about getting it checked for problems like leaks or broken parts.
If you can not sort the issue, we recommend you to consult gas safe registered engineer.

By following these steps, you can reset your Baxi boiler. This will help it run smoothly and keep your home warm and comfortable.