Baxi boiler E133 error code – Causes and Fixes

Winter is here! So is shivering and cold weather. One thing that keeps us warm and comfortable during the cold season is our boiler. But in winter, the boiler sometimes faces problems and displays error codes due to lack of maintenance and care. One of the daunting error codes commonly displayed on most people’s Baxi boilers is E133 Error.

The E133 boiler error indicates an ignition or gas supply fault on a boiler. This problem can be solved by some simple troubleshooting techniques in this blog. If these don’t work, then you will require professional assistance.

In this blog, I will explain how to solve the Baxi boiler E133 error code, the common causes and signs of indications, and when to avoid DIY techniques and seek assistance from a certified professional.

But before we move on further, let’s start with some basics!

What are Boiler Error Codes?

Boiler error codes are alphanumeric series that act as diagnostic functions, letting users know that faults, issues, or malfunctions within their boilers require immediate attention.

When your boiler suspects faults or errors, it temporarily halts the operation to prevent further damage and displays an error code.

What are the reasons behind the E133 error code?

To give you more details regarding the E133 boiler error, let’s understand the reasons behind the following:

1. Issue with the Gas Supply

   

   If gas is not properly distributed to your boiler due to shutting the main supply or some problems with the gas supply line, the boiler will display the E133 error code.

2. Boiler not igniting

   

   An E133 error code will be displayed if the boiler fails to ignite. The reason behind this is either a damaged ignition electrode or an issue with the boiler’s PCB (printed circuit board).

   Related Article: How to diagnose boiler PCB Faults and the cost of replacement

3. Frozen Condensate Pipe

   

   The condensate pipe carries wastewater from your boiler. If it freezes due to cold weather, an E133 error code will be displayed.

   Related Article: How to Defrost Frozen Condensate Pipe

4. Inconsistent Boiler Pressure

   

   The Ideal boiler pressure is 1.5 bars. If the pressure is too high or too low, the E133 error code will be displayed, and the boiler will go into lockout mode.

   Related Articles:
   How to increase boiler pressure

   Why Does my boiler pressure keep dropping

   My Boiler Pressure is too high, how can I reduce it?

5. Faulty Gas Valve

   

   The gas valve controls the flow of gases to the burner. If the inlet valve is closed or faulty, gases might not reach the burner, and the boiler will display an E133 error code.

   Related Article: Symptoms of faulty gas valve and what to do?
   

How to Fix the E133 error code problem?

The error code can be solved at home using simple troubleshooting techniques. However, if the methods do not work, the problem might be more complicated and severe. In that case, you should immediately contact a gas-safe registered engineer.

Troubleshooting Techniques that you can perform by yourself

Try a simple reset. First, refer to your boiler manual. Then, follow the instructions to locate the reset button. Press the reset button for 10 seconds. Then, wait 4-5 minutes and observe whether the E133 error is displayed. Hopefully, it won’t.

Confirm that your gas supply is working. To check that, turn on other gas appliances and see if they work. If you need help, contact your gas provider.

Check the boiler ignition electrode for dirt and dust buildup. The ignition electrode is a vital component of your boiler’s ignition system. Make sure you clean it carefully and remove any buildup of dirt and dust.

When to contact a Professional?

If the above techniques do not solve the problem, then there might be a problem with the internal components of your boiler, including the PCB. You should immediately contact a certified professional and refrain from tamper with the gas appliance alone.

Also, sometimes faulty components are caused by a too old boiler. The best decision you can make is to invest in a new boiler or get one on finance.

Cost to fix E133 error code

If the problem is minor, let’s say resetting your boiler or defrosting a frozen condensate pipe, it will cost you around £150 – £200. However, these minor problems can be solved by yourself. Let’s say it is a major problem related to a gas valve or PCB fault; it will cost you around £300- £500. This is when you need to consider whether to invest in this significant repair or a new boiler, as a new boiler costs between £500 and £3000.

Hassle-Free Boiler Installation

Get your new boiler installed today and save money on your heating bills with an new energy efficient boiler.

Get a New Boiler

Potential Steps You Can Take to prevent E133 error

There are specific preventive measures you can take to prevent E133 errors in the future possibly:

• Get an annual boiler service.
• Invest in a Boiler Cover.
• Keep the space around your boiler empty.
• Keep an eye on any leaks.
• Follow the manufacturer’s guidelines to operate your boiler safely and efficiently.

Boiler Service

Ensure your boiler runs efficiently and safely with our professional boiler servicing. Regular maintenance will save you money in the long run and potentially prevent breakdowns.

Schedule a Boiler Service

Final Thoughts

After reading the above, you know what the E133 error code means on your Baxi boiler. You also now know in what scenarios you should attempt to fix the problem yourself and in what scenarios you should contact a gas-safe engineer. The key takeaway from this blog is the importance of preventative measures. Make sure you follow them to keep your boiler running efficiently and effectively.

However, if your boiler is too old and has been used for 10-15 years, the smart decision is to invest in a new boiler. There is no need to be daunted by the hefty cost, as you can also get a boiler on finance.