Error E25/E26. Gas boilers Baxi. What is the cause and how to eliminate?

Oftentimes the unsung hero of home comfort, a dependable gas boiler keeps us warm and comfortable. Even the most reliable systems, though, occasionally experience glitches. If your Baxi gas boiler has ever displayed an E25 or E26 error code, you are aware of the frustration this can cause. But worry not—we’re here to explain these errors, their typical causes, and effective troubleshooting techniques.

First off, let"s demystify those cryptic error codes. E25 and E26 on your Baxi gas boiler typically indicate a problem with the ignition sequence. In simpler terms, your boiler is having trouble lighting up and getting the heating process underway. While it may sound alarming, these errors are often manageable with the right approach.

One of the most frequent causes of E25/E26 errors is a gas supply interruption. Your gas boiler needs a consistent supply of gas to ignite and produce heat, just like an automobile needs fuel to run. Verify that your gas supply valve is open and that your gas meter is in working order. Occasionally, the problem can be fixed with a straightforward gas valve reset or by making sure the pilot light is on.

The ventilation system of the boiler could be another reason for these errors. For safe and effective operation, gas boilers require adequate ventilation. Error codes like E25/E26 can be caused by obstructions or blockages in the vents, which can interfere with the combustion process. Examine the venting system surrounding your boiler to ensure that nothing is blocking airflow.

Moreover, E25/E26 errors may also be caused by electrical problems. Error codes can result from any disruptions in the intricate network of electrical components that your boiler depends on to operate. Examine any broken wiring, loose connections, or malfunctioning sensors that might be impeding the ignition process. An extensive examination and tightening of connections can sometimes fix the problem.

In conclusion, while E25 or E26 errors on your Baxi gas boiler can be annoying, they don’t necessarily mean that everything is lost. You can fix your boiler and resume having heat in your house by being aware of the typical causes of these error codes and taking proactive measures to troubleshoot them.

Error codes such as E25 or E26 in your gas boiler can be very annoying. These codes frequently indicate an ignition or flame detection issue with Baxi boilers. An ignition electrode that is unclean or malfunctioning can often cause interference with the ignition process. These mistakes can also be caused by improper combustion, which can result from a blocked flue or air intake. Thankfully, fixing these problems is usually simple. Make sure there is enough ventilation and start by cleaning the ignition electrode. If the issue continues, expert assistance might be needed to look for more serious problems, such as malfunctioning sensors or gas supply issues. Your heating system can remain trouble-free and avoid these mistakes with routine maintenance.

How to eliminate the error. Instructions

  1. Before starting work, you need to turn off the boiler, disconnect its power supply and cut off the gas supply.
  2. It is necessary to check the filter on the return line of the heating system. It is necessary to close the taps and drain the water from the boiler. To do this, put the drain pipe on the valve connection on the left and turn it to drain the water. The drain cock is then closed.
  3. Then it is necessary to check the filter, which is located on the return line of the heating system. Unscrew the plug, inspect the mesh located inside, rinse and clean it if necessary. Then the filter is put in place and fixed.
  4. Then the boiler is disassembled. To remove the front panel, use a Phillips screwdriver to unscrew two screws from the bottom. Pull the panel towards yourself and remove it from the fasteners.
  5. It is recommended to check the filter on the heating system. Unfold the control panel. The filter is located in the hydraulic group under the circulation pump. Dismantle the actuator for the travel valve: remove the bracket and take out the actuator itself. Then it is necessary to carefully pull out the capillary of the heating system pressure gauge. Then it is necessary to remove the bracket, which fixes the filter itself. Then, by undermining the bottom with a small screwdriver, you can remove the filter element. If the filter is dirty, it should be cleaned. Before installing the filter back, it is recommended to lubricate the sealing ring with special grease – this will help to avoid problems in the future dismantling, if the filter has to be removed again.
  6. After lubrication, the filter is put back on and secured with a clamp. The pressure gauge is also connected to the former place, the valve actuator is installed and they are fixed.
  7. Then open the taps for the heating system and boiler make-up. Raise the pressure to feed the boiler. The tap is closed.
  8. After this work it is necessary to check the circulation in the boiler. Fix the control panel, open the gas supply tap, connect the power supply and turn on the boiler. After starting the fan and turning on the pump, the boiler will start and circulation can be checked. If the boiler works well and does not display an error, the problem is solved and the operation of the device is restored.

Thus, clogged filters are linked to the error in the Baxi E25/E26 gas boiler model. It must be removed by disassembling the apparatus and cleaning the clogged areas. Following that, the boiler will start up again.

What could cause the error E25/E26?

There are additional potential causes of this error in Baxi boilers besides pollution. It might occur following system conversion-related modifications to the manifold unit with a closed stopcock.

An air lock in a new boiler could be the cause of this issue. This is a typical occurrence with new equipment. With the aid of the automated pump air vent, the air will release itself. Moreover, Maevsky cocks or extra auto-air ventilators can be used to remove air.

Freezing of the heating system as a whole or of a single element is another possible cause of the error. When one element becomes blocked, freezing can happen in a single-pipe system, preventing air from flowing through the entire system. Heat is required in the frozen area.

Air locking can also result from low-quality coolant. To fix the issue, it may occasionally need to be replaced throughout the heating system.

A hot water test is advised for Baxi boilers with two circuits. Once the error has been reset, run a check. If the boiler functions properly when it comes to hot water, but the error E25 shows up when you turn on the heating, it is probably broken. One of the mistakes that were previously examined could be the source of the error. When heating water, if the boiler displays an error, the boiler is the source of the problem. There could be various reasons:

  • Blocked or faulty circulation pump;
  • Clogging of the boiler heat exchanger;
  • Failure of the three-way valve or its motor;
  • Breakage of the automatic pump air vent;
  • Faulty temperature sensors;
  • Lack of electrical contact between the pump connection board and the cable;
  • Faulty control board.

The causes could manifest singly or in combination. Removing the Baxi gas boiler error relies on the specific issue at hand as well as the characteristics of the heating system. A lower flow rate results in Error E25 being generated. To get it operating again, you must identify the malfunctioning area.

Error E25/E26 Gas boilers Baxi
Cause: Blockage in the condensate trap or flue Elimination: Clean the condensate trap and check the flue for obstructions

It can be annoying and worrisome if your Baxi gas boiler is giving you error codes E25 or E26. Usually, these errors point to an issue with the flame detection or ignition system. Thankfully, there are a few actions you can take to identify and fix these problems.

First, look for any wear or damage on the electrodes and ignition leads. These parts may corrode or wear out with time, which would make the ignition system inoperable. Should you observe any problems, changing these components might be the solution.

Make sure the gas valve is fully open and that the boiler has an adequate supply of gas. Error E25 or E26 can be caused by partial valve closure or low gas pressure, which can lead to ignition failures. To ensure correct flow and adjust the gas pressure, seek advice from a qualified technician if needed.

A dirty or malfunctioning flame sensor is another frequent source of these errors. Once the gas is ignited, the flame sensor is in charge of determining whether a flame is present. The boiler may shut off and display Error E25 or E26 if it gets dirty or is unable to detect the flame with accuracy. Cleaning or replacing the flame sensor can often resolve this issue.

Lastly, if none of the aforementioned fixes resolve the problem, there might be a more significant problem with the wiring or control board of the boiler. To safely diagnose and fix the issue in such circumstances, it is best to get in touch with a licensed heating engineer or technician.

You should be able to fix Error E25 or E26 on your Baxi gas boiler and get your home’s heating back to being dependable and efficient by following these troubleshooting steps.

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Sergey Ivanov

I like to help people create comfort and comfort in their homes. I share my experience and knowledge in articles so that you can make the right choice of a heating and insulation system for your home.

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