E133 Baxi Boiler Fault: Meaning, Symptoms, Actions, Costs, Causes, Prevention

The E133 Baxi Boiler Fault indicates a gas supply issue or ignition failure in your boiler. This fault usually prevents your boiler from starting. It may go into lockout mode. This fault poses no direct safety risk. But, please fix it soon to avoid further issues. Common causes are a disrupted gas supply, a frozen condensate pipe, or faulty ignition components. Typical repair costs are £100 to £250. Preventative measures include: regularly check your gas supply and insulate the condensate pipe. Always contact a Gas Safe engineer to resolve this issue safely. The next section will explain the meaning of the fault in more detail.

Meaning of the E133 Baxi Boiler Fault

The E133 Baxi boiler fault points to a failure in the gas supply or an ignition problem. This fault code appears when the boiler cannot ignite after several attempts. Your boiler detects that there is no gas reaching the burner, or it fails to light the flame. The system then locks out to prevent damage or hazards. This fault occurs in models with electronic ignition. They rely on sensors to detect gas flow and flame presence.

If the boiler identifies a lack of gas or a flame failure, it shuts down to protect the system. External conditions, like a frozen condensate pipe, can trigger this fault. It disrupts the gas combustion process. The fault does not mean immediate danger. But, it signals that the boiler needs repair. It must be fixed to restore normal functionality.

What causes the E133 fault in Baxi boilers?

The E133 fault is caused by a lack of gas supply or a failure in the ignition process. It can result from blocked gas pipes, frozen condensate pipes, or faulty ignition components. If the boiler cannot detect the required gas flow or flame, it locks out and displays this error code.

Is the E133 fault code dangerous?

The E133 fault is not dangerous. The boiler locks out to prevent further issues. But, ignoring the fault can cause bigger problems. It may damage the ignition system or gas components. Always consult a Gas Safe engineer to resolve the issue.

Can weather conditions cause the E133 fault?

Yes, cold weather can contribute to the E133 fault. Freezing temperatures can freeze the condensate pipe. This blocks the gas combustion process. When this happens, the boiler fails to ignite and triggers the E133 code.

Does the E133 fault mean my boiler needs replacing?

The E133 fault does not automatically mean your boiler needs replacing. It usually means there’s a problem with the gas or ignition system. Both are repairable. Regular maintenance and prompt repairs can extend your boiler’s lifespan.

The next section will describe the symptoms of the fault in more detail.

Symptoms of the E133 Baxi Boiler Fault

The E133 Baxi Boiler Fault causes the boiler to shut down and enter lockout mode. You will see the E133 fault code displayed on the boiler’s control panel or screen. The boiler stops providing heating and hot water, leaving radiators cold and taps running only cold water. The boiler may try to ignite several times before it locks out.

Another symptom is hearing repeated clicking sounds from the boiler. It is trying to ignite but failing. This indicates the ignition process is failing due to the gas supply issue. If the issue is a frozen condensate pipe, you may hear gurgling or bubbling noises from the boiler or the pipe.

In summary, the main symptoms include:

• Boiler shutting down and showing the E133 error code.

• Lack of heating and hot water in the home.

• Clicking sounds from the boiler as it attempts to ignite.

• Gurgling or bubbling noises if the condensate pipe is frozen.

How To Recognise The E133 Fault on Different Types of Baxi Boilers

Different Baxi boilers may show or respond to the E133 fault in slightly different ways. Here’s how you can recognise the fault depending on the type of boiler you have:

Baxi Combi Boilers

Baxi combi boilers usually show the E133 fault code on the digital display, along with the lockout symbol. The boiler will stop supplying hot water and heating. You may notice the boiler trying to ignite multiple times before shutting down.

Baxi System Boilers

For Baxi system boilers, the E133 fault will show on the digital display. The boiler will shut off completely. You may hear the sound of the pump still running, but no heat will be delivered to radiators or hot water to taps.

Baxi Heat-Only Boilers

In heat-only boilers, the fault is similar. You may need to check the display or error light to find the E133 code. Like other types, the boiler will stop working. You may hear clicking sounds from failed ignition attempts.

Knowing how the fault shows on your boiler helps you. It prepares you for the next steps.

The next section will suggest actions to take in the event of the E133 fault.

What to Do When Your Baxi Boiler Shows the E133 Fault

If your Baxi boiler shows the E133 fault code, reset it. Follow your user manual for instructions. Resetting may temporarily resolve the issue if it’s caused by a minor glitch. Press the reset button on your boiler’s control panel and wait for it to restart. If the fault code returns, do not attempt further resets, as it indicates a persistent problem.

Next, check your gas supply. Ensure that the gas valve is open and that your other gas appliances, like a cooker or hob, are working. If none of your gas appliances are functioning, you may have a gas supply issue. If you suspect a gas leak, turn off the gas at the main valve and contact your gas supplier immediately.

If your home has had freezing weather, inspect the outside condensate pipe. A frozen condensate pipe can block the boiler’s operation. If the pipe is frozen, thaw it with warm (not boiling) water. Follow your boiler’s manual for instructions. Never attempt to tamper with any other parts of the boiler.

For any unresolved issues, contact a Gas Safe engineer. They are trained to diagnose and fix gas or ignition problems safely. Repairs beyond basic checks can be dangerous. They may void your boiler’s warranty.

Safety Disclaimer

Always follow the guidance in your Baxi boiler manual. Do not attempt any repairs or maintenance beyond what the manual recommends. For all other issues, contact a qualified Gas Safe engineer. This ensures safety and compliance with regulations.

How do I reset my Baxi boiler?

To reset your Baxi boiler, press the reset button located on the control panel. Hold it for a few seconds until the boiler begins to restart. If the fault code reappears, avoid repeated resets and contact a Gas Safe engineer.

Should I turn off the gas supply when I see the E133 fault?

You only need to turn off the gas supply if you suspect a gas leak. If you smell gas or suspect a leak, shut off the gas at the main valve and contact your gas provider immediately. For regular E133 faults, simply check that your gas supply is active and open.

Where is the condensate pipe, and how do I check it?

The condensate pipe is typically a plastic pipe that runs from your boiler to an outside drain. If you experience freezing weather, check this pipe to ensure it’s not blocked by ice. Follow the steps in your manual to safely thaw a frozen pipe using warm water.

Should I call a Gas Safe engineer for the E133 fault?

Yes, if the reset doesn’t work or if you’re unsure about the cause, it’s best to contact a Gas Safe engineer. They can safely diagnose and repair the gas supply or ignition issues that cause the E133 fault.

Cost to Repair E133 Fault on Baxi Boilers

The cost to repair the E133 fault on your Baxi boiler depends on the cause of the issue. For minor issues, like a frozen condensate pipe, the cost may be as low as £50 to thaw and insulate it. For major repairs, like fixing ignition parts or replacing a gas valve, costs can range from £150 to £300, depending on parts and labour.

If the flue is blocked or the gas supply needs inspection, costs could rise, especially if more work is required. If you have boiler cover, it often includes E133 repairs. This reduces your costs. Without cover, you should expect typical repair costs to fall between £100 and £250. The maximum cost would apply in cases of multiple issues or complex repairs. A boiler cover plan with regular maintenance helps avoid costly repairs.

The next section will describe the major causes of the E133 fault in more detail.