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Baxi e1 Fault Code

If you have landed on this page you must be feeling frustrated and overwhelmed due to an e1 fault code displayed on your Baxi boiler. Don’t stress! We have the solutions you need to get your Baxi boiler back up and running. In this blog post, we’ll provide you with the code solutions so you can get back to your regular heating schedule. Read on to learn more!

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What Is The Baxi E1 Fault Code?

The E1 fault code signifies sudden lowered water pressure and a leak meaning the system cannot function correctly. When a user encounters this error code on the display of a Baxi combi boiler, it means the system is overheating. That can be corrected by you (explained how below). 

Baxi boilers are commonly used for heating and hot water systems in homes and businesses. They offer a range of gas boilers including combi, system, and heat-only boilers. Baxi boilers are known for their high efficiency and reliability and are a popular choice among homeowners and contractors; however, sometimes things can go wrong and need fixing. 

What Causes The Baxi E1 Fault Code?

Here’s a summary of common E1-related fault codes and their potential causes and solutions for Baxi boilers:

E119: Low water pressure – This is the most common E1-related fault code and occurs when the water pressure in the boiler’s system is too low. To fix this issue, add water to the system to increase the pressure to the recommended level (usually around 1-2 bar).

E133: Gas supply fault – This code indicates that there is a problem with the gas supply to the boiler. To resolve this issue, check that the gas supply is still active and open and reset the system. If the problem persists, contact us.

E168: Electrical supply fault – This code indicates that the boiler has detected a problem with the electrical supply but is unsure of the source. To resolve this issue, try resetting the system. 

It’s important to note that the exact steps to resolve each fault code may vary depending on the specific model of the Baxi boiler. If you are unsure or uncomfortable with attempting any repairs, it’s best to call a heating engineer to diagnose and repair the problem.

How To Fix The Baxi E1 Fault Code?

To fix the fault code on your boiler you need to top-up (repressurise) your boiler, by following these steps:

  1. Locate the filling loop or header tank in the system. This is usually found near the boiler or in the loft.
  2. Make sure the heating system is turned off and the pressure gauge is showing a low reading.
  3. Connect the filling loop or use the header tank to add water to the system until the pressure gauge reaches the recommended level (usually around 1-2 bar).
  4. Once the pressure is correct, close the valve on the filling loop or header tank and turn the heating system back on.
  5. Check the pressure gauge regularly to ensure it remains at the correct level.

It’s important to note that these steps may vary slightly depending on the type of boiler and heating system you have. If you’re unsure or uncomfortable with the process, it’s best to call our heating engineer to help. Take a look at our outstanding reviews here.

Still Having Issues? 

Having an error code appear on your boiler is always a bother, especially during the winter months! If you have tried all of the above and still have the e1 error code displayed, we can advise you and give you a solution to this problem so your Baxi boiler will be up and running in no time!

Email us at or phone us on 07595749098 for more advice. If you are looking to purchase a new boiler you can contact us down below. Want more advice? Check out our plumbing FAQ page. 




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