E20 Fault Code Baxi Boiler

Описание: Boilers are machines. Even the most reliable and well-maintained boilers can encounter issues from time to time.

Let's find out what the E20 error code is in the Baxi boiler.

🔍 What is the E20 error code?

[PROBLEM WITH A HEATING FLOW SENSOR]
This E20 fault code means there’s trouble with the primary temperature sensor. This little sensor plays a big role—it constantly checks the heat exchanger’s temperature, making sure your boiler runs smoothly. But when it malfunctions or sends inaccurate readings.

Your boiler takes no risks. It shuts down as a safety measure to prevent overheating or further damage.


🛠️ Possible Causes:

Let's see what causes the E20 error.

[FAULTY NTC THERMISTOR]
At the heart of this issue is a small but mighty component: the NTC thermistor. This little sensor is in charge of detecting the water temperature inside your boiler. If it goes faulty, it starts sending wrong temperature readings to the boiler’s control system—confusing the system and triggering the E20 error.

[LOOSE OR DAMAGED WIRING]
But that’s not the only possible culprit. Sometimes, the problem isn’t with the sensor itself but with the wiring that connects it to the boiler’s control board. Loose or damaged wires can mess up the communication between the sensor and the system, leading to the same frustrating error.

[FAULTY CONTROL BOARD]
And while it’s rare, there’s also a chance that the boiler’s control board—the brain behind the operation—is at fault. If the PCB (Printed Circuit Board) can’t process the temperature data correctly, the system may misinterpret perfectly fine readings as errors.

[EXTERNAL FACTORS]
Lastly, let’s not forget about external factors. Power surges, water damage, or even excessive humidity can interfere with the thermistor, its wiring, or the control board—causing unexpected faults.


🔧 How to Troubleshoot:

Let's find out how to fix the E20 error code.

[REPLACE THE NTC THERMISTOR]
First up, if the NTC thermistor is the culprit, it needs to be replaced. That means carefully removing the faulty sensor and installing a brand-new one that matches the boiler’s exact specifications. This little component plays a big role in temperature regulation, so getting the right replacement is key.

[REPAIR WIRING CONNECTION]
Next, we check the wiring connections. If any wires are loose, damaged, or corroded, they need to be secured or replaced. Even a tiny fault in the wiring can disrupt communication between the thermistor and the control board—so this step is crucial.

[TEST AND REUSE THE BOILER]
Finally, once everything is in place, it’s time to test the boiler. The system is powered back on, checked for consistent performance, and reset to clear the error code. If all goes well—no more E20!

[CALL A PROFESSIONAL GAS SAFE ENGINEER]
If the fault persists after these steps, it’s time to call in a professional to take a closer look. You’ve done your part—now let the experts handle the rest!


🏢 About Us:

At Serviceteam, our team of skilled Gas Safe engineers handles every make and model of gas and electric boilers. As a professional boiler installer, we meet the manufacturer's high standards and provide exceptional service and peace of mind.


📞 Need Help?

We guarantee to meet the highest standards set by the manufacturer.

We hope this video has been helpful. Click on the link below to book a Serviceteam heating engineer. Thanks for watching, and stay warm!

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