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What Is The Baxi E1 Fault Code?

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:
- Locate the filling loop or header tank in the system. This is usually found near the boiler or in the loft.
- Make sure the heating system is turned off and the pressure gauge is showing a low reading.
- 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).
- Once the pressure is correct, close the valve on the filling loop or header tank and turn the heating system back on.
- 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?

Email us at info@tyneandwearheating.co.uk 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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