Baxi boiler error codes: what the codes on the display mean and how to fix typical faults

Self-diagnosis in Baxi boilers is accompanied by visualization using a light indication or displaying the corresponding codes on a liquid crystal display. The integrated system allows you to monitor the operation of all components of heating units in real time. The generated errors indicate violation of operating conditions, malfunction of individual boiler elements.

SUMMARY TABLE OF FAULT INDICATIONS

Thanks to a prompt response to indicator readings, it is possible to avoid major breakdowns, contact service in a timely manner, or carry out the prescribed operations yourself to eliminate the error. Therefore, it is so important that owners of Baxi boiler equipment are well versed in the signals supplied by the electronics and are able to correlate errors with groups formed based on their connection to the signaling device.

Devices in Baxi boilers that signal errors via electronic board pulses

The operation of the diagnostic system, first of all, consists of receiving (reading) readings from devices that monitor the occurrence of certain processes in the boiler. Next comes the systematization (processing) of the received information by the electronic board and its further visualization using signal indicators or graphic codes on the built-in display. Diagnostics is based on readings from the following devices (elements): 1. Flame control sensor. 2. Thermostat responsible for protection against overheating. 3. Draft sensor for Baxi atmospheric boilers (with an open combustion chamber). 4. Pneumatic relay (draft sensor) for turbocharged models with a coaxial chimney. 5. Flame control electrode for units of the Luna-3, Nuvola-3, Comfort series. 6. Heating circuit temperature sensor. 7. Temperature sensor for the hot water supply circuit. 8. Coolant pressure switch in the heating system. 9. Hydraulic pressure switch. 10. Electronic board.

Additional errors

Other messages may appear on the LCD display of your boiler, which should also not be ignored:

• Flashing "!" signals operation at the lowest power. The reasons for this may be abnormal gas pressure at the inlet, problems with electronics, clogged chimney and/or air duct, problems with the gas valve.
• The flashing sign St means that the boiler has automatically switched to defrosting mode. Once this function is completed, the message should disappear from the screen. Otherwise, a failure occurs.
• The radiator and mixer symbols are flashing - this indicates scale deposits or problems with the temperature sensor attached to the DHW circuit.

All these malfunctions must also be eliminated by specialists of the relevant profile who have the necessary competencies

Typical causes of errors in boiler equipment

As evidenced by analytics based on data from service centers, in most cases, breakdowns and, as a result, the appearance of error signals are due to the following reasons: • neglect of the requirements regarding the installation of a gas generator; • incorrect connection of the unit to the electrical network, especially to backup power sources; • moisture getting on the gas burner or electronic board of the heating boiler; • depressurization or clogging of the smoke channel; • low quality coolant; • lack of devices responsible for water treatment for the hot water supply circuit; • unauthorized change in operating pressure in the gas main; • voltage drops in the electrical network. Some of the errors generated can be eliminated by fine-tuning and restarting the boiler, but often it is necessary to call a specialist from a service organization to regulate or replace the boiler unit (part).

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Almost any buyer of Baxi wall-mounted gas boilers, sooner or later, encounters some malfunctions and breakdowns of the device. Experts strongly recommend carrying out gas boiler maintenance at least once a year: flushing the heat exchangers, cleaning off accumulated scale, checking the functionality of the sensors before the start of the heating season.

However, modern heating equipment tends to break down over time, which will require repair or replacement of spare parts. Let's consider one of the most popular brands in Russia - this is the Baxi gas boiler, its malfunctions and errors are displayed on the control panel under special codes under the symbol "E", which is an abbreviation for the English word "Error" - error.

Let's consider the main malfunctions that a user of a Baxi gas boiler may encounter when there is no hot water and why the boiler does not heat the water, the pressure drops, the burner of the Baxi Main Four 240F or Baxi Eco Four 24F and other models does not turn on or ignite.

We will analyze all the errors of the device according to the instructions, the reasons for their occurrence and methods for eliminating the problems that arise on our own or by specialists.

Display of the Baxi gas boiler
Baxi boiler: errors if they malfunction
Italian wall-mounted double-circuit and single-circuit gas boilers are equipped with an informative digital display that displays not only information (symbol “A”): the temperature of the water in the heating system or in the DHW circuit, or setting parameters (symbol “F”): operating modes and warnings, but also errors under codes “E”.

If the “R” symbol appears on the display, this means that a malfunction has occurred and you can try to fix this problem yourself. To do this, press the “R” button and hold it for several seconds. If this does not help, then it is better to immediately call a specialist gas specialist to your home.

However, let's take a closer look at the error codes that we may encounter when operating the Baxi boiler.

Error E01.

This is one of the most common errors that occur when operating Baksi brand gas boilers. It signals that there is no ignition in the device, as a result of which the boiler does not turn on.

Error Baxi E01
1. It is necessary to check whether the gas shut-off valve is open or whether there is “airing” in the gas fittings of the device at low gas pressure.
2. The flame electrode or the wire leading to the ignition unit may be faulty.

3. Gas valve or electronic board is faulty. Check all connections between them.

Error E02.

Another common error under the symbol “E02” indicates to us that the safety thermostat of the Baxi boiler has tripped. Usually this error is displayed when the boiler does not heat the water in the heating system well.

1. Check whether the pump impeller is blocked when there is no coolant circulation.

2. The main heat exchanger may be clogged and requires cleaning.

3. It is also necessary to check the limit thermostat connector and the NTS temperature sensor of the heating system at the boiler inlet.

4. A faulty electronic board may also be the cause of error E02.

Error E03.

This error indicates that parameter F43 was incorrectly set when setting up the boiler, which leads to an error in the configuration of the electronic board. To change settings, press and hold two buttons simultaneously for at least 6 seconds:

Buttons
Error E04 .
This malfunction can occur in two cases:

— no ignition; — the flame broke out.

1. It is necessary to check the integrity of the connections between the ignition unit and the flame sensor, as well as between the board and the gas valve.

2. Insufficient draft may cause flame failure.

Error E05.

The heating circuit temperature sensor at the inlet to the Baxi gas boiler has failed. It is also possible that the wiring of this sensor may be broken or short-circuited.

Error E06.

The DHW (water) temperature sensor is faulty or its wiring has broken, the circuit has opened, or the wiring has short-circuited.

Errors E07 and E36.

The combustion product (exhaust gas) temperature sensor may need to be replaced or its wiring may be broken.

Error E08.

This code indicates that due to a lack of grounding of the electronic board, an error has occurred in the flame signal amplification circuit. You need to check the “x4” connector between the power terminal and the board itself.

Error E09.

A malfunction of the electronic board of the Baksi boiler generates an error in the gas valve protection circuit. The board will need to be replaced.

Error E10.

This error indicates a malfunction of the hydraulic pressure switch or a break in its wiring. Also measure the pressure in the boiler heating circuit. Error E10 may appear if the pressure drops below 0.5 bar.

The exclamation point symbol is flashing.

Error warning on the display.
It is recommended to check the cable between the board and the gas valve for breaks, the pressure settings on the valve, the chimney for blockages, as well as the functionality of the flame and flue gas sensors.
Another reason for this malfunction may be an incorrectly assembled chimney, especially with regard to its length. All these nuances may indicate to us in this case that the Baxi gas boiler is operating at a minimum of its power.

Error E22.

There was a voltage drop in the electrical network below 160 Volts. The boiler automatically reboots or switches off spontaneously. It is necessary to identify the cause of low voltage in the network.

Error E25.

A fairly common error with the Baxi boiler can occur if there is no normal water circulation in the heating system.

1. Due to a clogged heat exchanger or a jammed pump, circulation in the heating circuit has disappeared.

2. A malfunction of the NTS heating temperature sensor at the inlet or its overheating (error E26) can also be the reason for the lack of circulation.

Error E27.

It is necessary to check the reliability of fastening of the DHW circuit temperature sensor and its contacts; the sensor clamp may have become disconnected from the pipe on which it is installed.

Meanings of symbols on the Baxi boiler display
Error E35 .
This error may indicate a false (parasitic) flame presence signal.

1. The electronic board is not grounded. 2. Check the location of the flame sensor (electrode).

Errors E40 and E41.

These errors occur when the gas inlet pressure is insufficient, which should be at least 9 mbar, or the boiler chimney pipe is clogged. These problems may be caused by:

— incorrectly adjusted pressure on the gas burner; — cable break between the electronic board and the gas valve modulator; — malfunction of the flame electrode or flue gas sensor.

The “Battery” and “Tap” symbols flash alternately.

Scale has formed in the heat exchanger due to “hard” water. This usually becomes noticeable when the boiler does not heat the water in the DHW circuit well, but the batteries heat up well. It is necessary to clean the main heat exchanger with a special liquid that removes scale. The DHW temperature sensor may need to be replaced.

The icons flash on the display
Error E42 .
This malfunction is typical, as a rule, for Baxi turbocharged boilers with a closed combustion chamber. Because error “E42” is related to the operation of the fan (turbine). It is also possible that the voltage in the network has dropped below 180 V or the chimney is clogged and needs to be cleaned.

Error E50.

When the exhaust gas temperature exceeds 180 C, an emergency sensor is triggered, which is indicated by error “E50” on the display. Another reason may be that the main heat exchanger is clogged with scale, causing insufficient circulation in the boiler.

Error E55.

This code “pops up” when the gas valve operating parameters are incorrectly configured. This happens, for example, after replacing the boiler electronic board.

Error E62.

If the flue gas and flame sensors are faulty, the boiler generates an error about the unstable signal received from them. It is necessary to check the wiring of these sensors or replace them. There may also be problems with the electronic board.

Error E65.

Frequent activation of the boiler chimney check function for clogging. This occurs either due to too low gas pressure or failed flame and exhaust gas sensors. It is also recommended to check the boiler chimney for blockages and check the burner operation settings.

Error E98.

When replacing the boiler electronic board with a new one, parameters F03 and F12 on the board were not configured. They must be configured in accordance with the Baksi boiler model.

The “St” symbol is flashing and the coolant temperature is below 2 C.

The heating circuit is frozen or the heating inlet temperature sensor is faulty. The burner does not turn on because the boiler defrost function is turned on. It is recommended to turn off the power supply to the device, then completely defrost the boiler and turn it on again.

The "LoP" symbol is flashing.

Insufficient gas inlet pressure, which according to standards should exceed 6 mbar. The boiler has a low gas pressure function enabled. The gas valve settings need to be adjusted.

We have analyzed the main malfunctions of the Baxi gas boiler, errors that occur when the device breaks down, which are displayed on the boiler display. We examined the causes of these malfunctions and methods for eliminating them. Answered the basic questions: why does the boiler not heat the water, why does the burner not turn on or ignite?

We strongly recommend that you carry out annual maintenance on your wall-mounted gas boiler to avoid major repairs in the future and the replacement of expensive spare parts.

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Troubleshooting once identified

After the letter “E” appears on the display with digital indexing (the indicator lights light up), it is necessary to compare the observed signal with the list in the error classifier. As a rule, it takes up several pages in the operating manual of the gas unit. Having established the cause of the error, they proceed directly to eliminating it. For example, an error “E01” was recorded - starting the heating boiler is impossible. In this case, the coolant pressure in the system on the pressure gauge drops and the burner does not ignite. The cause of the malfunction may be: confusion when connecting phase-dependent equipment to the power supply, critical accumulation of air in the heat exchanger of the unit. To eliminate the error, you must perform the following operations: • correctly connect to the electrical network (you can use the color coding of the wires in the electrical cable as a guide); • add liquid to the system, simultaneously bleeding air through Mayevsky valves on heating devices and automatic air valves; • restart the boiler and make sure that the error has been eliminated. Many errors associated with the operation of the electronic board of Baxi boilers can be avoided by connecting the gas boiler to the electrical network through a galvanically isolated stabilizer or using an uninterruptible power supply. It is very important that the household appliance is grounded. To purchase additional equipment, take advantage of the offer from.

Decoding

The cause of error E96 of the Baxi boiler is a low supply voltage. According to the instructions, reliable operation of the heating unit is guaranteed at ~230 V. In practice, Baxi starts on its own after stopping, as soon as the network U reaches this level, so users often do not notice the 96th error. But if this happens regularly, the problem needs to be addressed. Long-term decommissioning of a boiler is fraught with many negative consequences, the elimination of which will require serious financial expenses.

Error 96 on the Baxi boiler control panel

Maintenance and cleaning

If the system is heavily clogged, the temperature drops and the efficiency of the boiler sharply decreases, which leads to a deterioration in the microclimate in the house and excessive gas consumption. To extend the life of a Baxi Main boiler or another model, as well as to maintain high efficiency, it is necessary to periodically clean the heat exchanger using a special device and cleaning fluid.

Video: flushing the Baxi Main boiler

Repair and maintenance of boilers when error codes e01, e03, e10 appear can be done with your own hands. More complex faults that involve complex adjustments or replacement of elements require calling a gas equipment specialist. In addition, it is better to contact a service center if the boiler is under warranty, since independent repairs will void it.

Rating of gas boilers

Possible breakdowns of Baxi boilers

Repair work on baxi boilers should be done with your own hands only if there are visible and easily removable causes of the breakdown. If you have no experience in handling the units or do not have special tools, it is better to entrust boiler repairs to a competent technician.

Possible breakdowns:

• — the boiler burner does not turn on or goes out;
• — ignition becomes impossible;
• — popping sounds are heard in the combustion chamber;
• — the boiler overheats;
• — the maximum heating temperature of the coolant becomes insufficient;
• — the boiler operation becomes noisy;
• — one of the sensors or elements of the system fails.

Causes of failure of baxi boilers:

• — moisture has entered the boiler;
• — water (coolant) of low quality;
• — there has been a drop or decrease in gas pressure in the gas pipeline;
• — there was a power supply voltage drop;
• — the heating system was installed incorrectly.

Troubleshooting Tips

The following points can be used as instructions for troubleshooting the Baksi gas boiler:

1. The burner is not operating at full capacity. Such an error in the operation of gas equipment can occur in a situation where the pressure inside the system is not adjusted correctly. A similar problem also appears if the gas modulator is damaged. Or the diode bridge may be faulty. You can cope with this problem by adjusting the system parameters according to the equipment operating instructions.
2. The heater turns off immediately after being turned on. This problem occurs in gas appliances due to low pressure in the gas pipeline. Possible solution: it is necessary to adjust the gas pressure down to 5 mbar.
3. The coolant does not heat up when turned on. To fix it, you should recheck the gas valve. It is possible that the minimum and maximum values ​​have changed places.
4. Modulation mode is faulty. This problem can be solved by reinstalling the valve.
5. Temperature sensors show incorrect data. In this case, you should also remove the sensor and replace it with a new one.
6. The hot water supplied to the taps is not heated enough. To restore water heating, you need to make sure that the three-way valve is fully open. Sometimes this happens if this device is damaged. To be sure that the malfunction is caused by the valve, you need to wait a little until the system cools down. After this, the shut-off valves should be closed. Then switch the device to hot water supply mode. If the heating system becomes hot as a result, it means that the problem was in the valve and it needs to be replaced.
7. Sharp shocks are heard when the burner is ignited. Uncharacteristic noises can occur due to various factors: one of them is too low pressure in the gas pipeline. Another thing happens due to improper transportation of the boiler, when the igniter is displaced and the distance from it to the gas supply becomes greater or lesser. The solution to this problem is to set the correct distance. It should be approximately 4-5 mm.
8. You can adjust the gap between the igniter and the burner on a Baksi gas boiler as follows: the front panel is opened and removed from the device. When this is done, the flap is removed from the inspection hole. There is an igniter there. To give it the correct position, you need to unscrew the screw with which the electrode is attached to the boiler. The igniter must be removed, carefully bent and then returned to where it was, and then the damper must be closed.
9. A strong decrease in coolant temperature. This often happens due to dirty filters. The only way to eliminate them is to clean them. Sometimes filters need to be replaced if they are severely clogged. It is also worth checking for damage to the pipeline. If, for example, radiators are clogged or exposed to low temperatures, only repairs will help. The damaged segment will need to be replaced or cleaned.

Advice

Self-repair of the mechanical part is possible, but it is more advisable to replace the pump if the cause of the E26 error is in it. It is inexpensive, but restoring functionality is not easy, as users write on the forums. Replacing the same impeller is not difficult, but it also needs to be centered, which is something that home-grown “experts” are silent about. The support bearing is the only part that will not cause any difficulties. And one more nuance. Error E26 appears when the internal channel of the Baksi boiler pump, through which air is discharged, is clogged with tiny suspensions. To clean it, you will have to disassemble the device. The difficulty is in repeating the actions in reverse order. It is not a fact that a self-assembled pump will work as it should.

How does a circulation pump work?

Air in the circuit

Difficulties in moving the coolant are caused by airing in the system. You should check by touch the degree of heating of pipes and heating radiators. At the same time, see if there are any puddles on the floor - a leak will initiate overheating and error E26 of the Baksi boiler.

A cooling battery will indicate a problem area in the circuit. It is recommended to bleed air manually wherever it is provided, regardless of automatic valves - they do not always work, especially after long-term operation. The accumulation of bubbles, which impairs the circulation of liquid, also occurs in the Baksi boiler pump, which causes error e26. You need to bleed it out too.

Advice

When replacing a unit, make sure that the designations (letters + numbers) on the panel are identical. The manufacturer is constantly working to improve the performance of the equipment by making changes to its design and electrical circuit. Control boards for Baksi boilers are universal, replaceable or non-replaceable: it depends on the series and year of manufacture of the heating unit. Masters with a lack of experience do not know about this or forget - take this into account! When replacing the board with a universal unit, adjustments must be made to the boiler settings.

Work algorithm

produces metal combustion chambers for its boilers. From the outside, the part is protected by a heat-insulating layer. Just above the chamber there is a copper heat exchanger. When the heated room becomes warmer or colder, the thermostat turns on. Its work is automated. The thermostat sends a signal to turn on the water pump. It begins to pump water by creating a vacuum in the pipes. Then warm water enters the pipeline.

When turned on, the boiler power increases gradually. This happens before the water temperature rises to the required value. Then the heating mode switches to modulation mode. When the coolant cools, the temperature sensor gives a signal to open the inlet valve. This starts the electric ignition, and the water temperature again reaches the desired level.

If the room does not require additional heating, the boiler starts operating in DHW mode. It consists in the fact that cold water enters the secondary circuit through a three-way valve, which, in turn, blocks the heating line. Gas is supplied to the burner using a special valve , and the power of the device gradually increases. When the water is already heated to the desired temperature, its adjustment mode is activated.