🕑 9 minutes read

If you own a Baxi boiler, encountering the E119 fault code can be a common yet frustrating issue. This error code indicates a problem with the boiler's pressure, often leaving homeowners puzzled and seeking quick solutions.

Let's break down what the E119 fault code means and why it appears, and provide step-by-step guidance on how to fix it, ensuring your heating system gets back to its flawless operation.

What is the E119 Fault Code?

The most common error code you'll encounter with a Baxi boiler is the E119 code. This indicates that your boiler has detected low pressure, which means it needs more water in the system to function properly.

To verify this, check the pressure gauge on your boiler. If the reading is low, it confirms the issue.

Boiler pressure needs topping up occasionally. This is easy, especially if your boiler has an Easy-Fill permanent filling link. Once you top up the pressure, the E119 fault code should disappear.

One common issue with boilers is the E119 fault, often referred to as a "low-pressure fault" or a "low " or "ensure fault."

Why Does Boiler Pressure Drop?

It's normal. Its boiler pressure will decrease over time and needs to be topped up occasionally. Various factors can cause this, such as:

  • Bleeding Radiators: Releasing air from your radiators can reduce system pressure.
  • Leaks: Small, often unnoticed leaks in the heating system can cause pressure to drop.
  • Regular Use: Daily use can naturally lower pressure over time.

If your boiler pressure continues to drop, ask your installer or a Baxi Customer Service engineer to inspect the system.

How to Increase the Pressure on Your Baxi Boiler?

Follow these simple steps to repressurize your Baxi boiler:

  • Turn Off the Boiler: Ensure the boiler is off and has had time to cool down before you start.
  • Locate the Filling Loop: This is a metal hose with two valves, typically found underneath the boiler. It might have end caps that need to be removed.
  • A-Baxi-Boiler-Filling-Loop
  • Check for End Caps: If your pipes have end caps, make sure they are in place.
  • Attach the Filling Loop: Securely connect the filling loop to the system to prevent leaks.
  • A-Filling-Loop-image-is-attached-to-Baxi-boiler
  • Open the Valves: Slowly open the valves to let water flow from the mains into your heating system.
  • Listen for Water Flow: If you don't hear won't, there may be a more serious problem.
  • Monitor the Pressure Gauge: Watch the gauge as the pressure increases. The ideal reading is around 1.5 bar.
  • Remove the Filling Loop: Carefully disconnect the Filling Loop. There might be a few drops of water, which is normal.
  • Check for Drips: If water stops dripping from the valves, they are tightened properly. Replace the end caps if needed.
  • Monitor Pressure Changes: Pay attention to the pressure over the next few weeks, especially when heating water or using the heating system. If the pressure drops again, there might be a leak.

By following these steps, you can ensure your Baxi boiler runs smoothly and efficiently.

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What to Watch For After Topping Up?

After increasing the pressure, monitor it over the next few weeks, especially when using heating or hot water. If the pressure drops again, it might indicate a more significant issue, such as a persistent leak. In this case, contact a professional gas heating engineer to inspect your system.

By understanding and managing the E119 fault code on your Baxi boiler, you can ensure it runs efficiently and avoids potential breakdowns. Maintaining a warm and cosy house requires regular maintenance and monitoring.

What If the E119 Boiler Fault Code Keeps Appearing?

If your boiler continues to show the E119 fault code, it's essential to have it inspected by a qualified heating engineer. This code indicates a loss of pressure, which can result from various issues.

A professional engineer will identify the root cause of the problem and suggest the best solution. They might recommend repressurizing the system, replacing specific parts, or fixing any leaks. Moreover, the engineer will ensure that your boiler operates safely and efficiently.

Regular maintenance, annual boiler service and professional inspections are crucial to keeping your boiler in good working condition and preventing recurring issues.

Things to Know About Boiler Pressure

1. Why is Boiler Pressure Important?

Boilers must be pressurized to maintain the proper pressure levels within the system. Without the correct pressure, the boiler cannot heat the water to the desired temperature and may compromise its safety features.

Additionally, low pressure can cause water leakage and other damage to the system.

2. What Happens If a Boiler Is Not Repressurized?

If the boiler pressure isn't at the level:

  • The boiler won't heat the water properly.
  • Safety features may be compromised.
  • Low pressure can lead to water leaks and system damage.

3. How Often Should You Repressurize a Boiler?

Boilers typically need repressurizing annually. If your boiler loses pressure more frequently, it could indicate a more serious problem. In such cases, seek professional advice.

4. Can Too Much Pressure Cause a Boiler to Explode?

Yes, operating a boiler at extremely high pressure can cause it to explode. Boilers are designed to operate within certain pressure limits (1-2 bars). Exceeding these limits can dangerously raise the internal pressure, potentially causing boiler failures.

5. Does Bleeding Radiators Lower Boiler Pressure?

Yes, It Does!
Bleeding radiators involve releasing trapped air that blocks the flow of hot water. When air gets trapped inside your radiators, it prevents hot water from circulating effectively. This blockage can cause uneven heating in your home and increase the pressure within your boiler system.

By bleeding the radiators, you release this trapped air, allowing the hot water to flow freely and reducing the system's pressure. However, other issues such as leaks, faulty overflow pipes, or pressure relief valve problems can also affect boiler pressure.

If pressure problems persist after bleeding all radiators, consider calling a professional heating engineer.

How Bleeding Radiators Affect Boiler Pressure?

When you bleed a radiator:

  • Trapped Air is Released: This air can cause the system to become pressurized.
  • Water Flow Improves: Hot water circulates evenly throughout your home without air blockages.
  • Pressure Drops: Air release decreases the overall pressure in the system.

Other Factors Affecting Boiler Pressure

While bleeding radiators are an effective way to manage boiler pressure, other issues can also impact the pressure in your system:

  • Leaks: Small leaks in the system can cause pressure to drop continuously.
  • Faulty Overflow Pipes: If the overflow pipes are not functioning correctly, they can contribute to pressure problems.
  • Pressure Relief Issues: A malfunctioning pressure relief valve can prevent the system from maintaining the correct pressure.

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When to Call a Professional?


If you've bled radiators and the pressure issues persist, it's time to install a professional heating engineer. Persistent pressure problems could indicate:

  • A more serious leak
  • Faulty components that need replacing
  • Issues with the boiler itself

Why Regular Maintenance is Important?

Bleeding your radiators and looking for leaks are two examples of regular maintenance that may avoid pressure issues. It ensures your heating system runs efficiently, keeping your home warm and comfortable.

You can maintain a secure and efficient heating system in your house by being aware of how bleeding radiators affect boiler pressure and when to call a professional.

Call Serviceteam Boiler Professionals

Serviceteam's engineers are committed to delivering prompt and professional repairs. Once they arrive on-site and diagnose the issue with your boiler or central heating system, they will proceed with the necessary repairs.

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To explore more about boiler error codes, check out our blogs in the Boiler Error Code section.


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