Immergas gas boiler errors: error codes and how to resolve them

Agree that information about a boiler malfunction can speed up the restoration of its functionality. After all, determining the cause of the breakdown is half the battle.Right? Moreover, the error code of the Immergas gas boiler is always indicated on the display and you just need to decipher it.

And we described in detail how to do this correctly in our article. After familiarizing yourself with this, the owner of an Italian boiler will be able not only to identify malfunctions, but also to assess the situation and make a decision on how to restore its functionality.

Immergas boiler error codes

The equipment of the specified Italian brand is modern, so the determination of the reasons that lead to inoperability occurs automatically, with further indication on the display.

But you should use such information with caution, and also remember that the owner of the boiler is responsible for its safe operation, timeliness, completeness and quality of repairs. And if his actions are found to be wrong, the owner of the equipment may be punished. This is stated in the Code of Administrative Offenses (Article 7.19), and in more serious cases sanctions will be imposed in accordance with the Criminal Code.

Explanations of error codes are traditionally indicated in each instruction manual supplied with the boiler. But you should remember that the manufacturer Immergas provides information about faults to specialists. That is, ordinary users can use the codes solely at their own peril and risk. Therefore, it is better to entrust troubleshooting to a specialist.

An important feature of this Italian manufacturer is that its models use different software. As a result, it happens that the same warning signals are indicated by several types of codes. But they can all be combined into several categories.

Problems with boiler ignition

Codes errors 01, E00, E02 indicate that the boiler operation is blocked, and the reason for the blockage is the lack of ignition.

It is possible to restore the operation of the unit after blocking due to lack of ignition by pressing one button. But you shouldn’t rush to do this, since you should initially make sure there is no smell of gas, the presence of draft, ventilate the room and only then try to resume the operation of the boiler

Often this problem occurs after a long period of inactivity of the gas unit, for example, in the off-season, due to the accumulation of air in the gas supply channels.

To restore functionality you should:

1. Restart;
2. If after 10 seconds ignition has not occurred, then press the Reset button. This operation will automatically unlock the boiler.

As a result, residual air will be removed from the gas supply pipelines and the heating equipment will start.

When overheating is to blame

Codes errors 02, 12, E12, b 19 indicates that the boiler operation has been stopped by a signal from the thermostat due to overheating. In addition, the listed errors can be caused by malfunctions in the flame control system.

When in use, the heat exchanger channels quickly become clogged with scale and rust particles, which leads to a disruption in heat exchange.Therefore, after every couple of heating seasons, cleaning should be carried out, and without waiting for a warning signal on the display

The cause of the problem can be identified by tightening the contacts and checking the integrity of the wires.

In the worst case, you will have to replace the sensor itself.

Ventilation system malfunction

Signal from code 11 indicates that there is insufficient draft in the smoke exhaust system. This error code cannot be ignored. It appears on the display after the third automatic blocking of the boiler due to the specified reason, and in a row.

The photo shows a design element of the smoke removal system, the internal channel of which is almost completely clogged with soot, which reduces the performance of the boiler

More precisely, after each time the gas equipment is turned off, it starts automatically. But if traction sensor again signals that the situation has not returned to normal, then the electronics immediately switches off again.

The danger of the situation is indicated by the fact that simultaneously with code 11, the display turns red.

There are two ways to eliminate the cause. Which include:

• cleaning the channels of ventilation and smoke removal systems from soot and foreign objects;
• changing the design of ventilation and smoke removal systems. This will have to be done if cleaning does not give the desired long-term effect.

In this case, you can unlock and start the boiler by pressing the restart button.

The photo shows ice on a smoke exhaust pipe. Moreover, such formations can grow in a matter of hours in severe frost. At the same time, the boiler can be restored to operation by chipping or melting the ice.

Before you begin any action, you should definitely make sure that there is traction.

Another problem in the ventilation system indicates code 03. In this case, the boiler operation is blocked by a command from the combustion products removal control sensor.

If an error code number 03 appears on the display of a gas boiler, this means that there may be carbon monoxide in the room. Therefore, eliminating the problem should be approached with all seriousness.

Causes:

• reduction in the efficiency of the chimney due to the accumulation of soot and other combustion products on the internal surfaces of the channels. And in difficult climatic conditions, the boiler shuts down due to the formation of ice;
• fan malfunction, if provided.

In the first case, you can identify a malfunction of the Immergas gas boiler simply by looking into the chimney. If it is discovered that the internal channel is completely or partially blocked by foreign objects, soot, or ice, then cleaning will be necessary.

Fan problems

Appearance of codes errors 16, E29, b 28/b 29, b 65 caused by a shutdown or breakdown of the fan or Hall sensor.

The cause is a malfunction of the product itself or a problem in the circuit. For example, it could be a weakening of contacts. In addition, it is recommended to diagnose fuse F3.

If it is not possible to restore functionality using any of the above methods, then you will have to diagnose the electronic module.

Error code E65 can be seen on the display when the fan stops working. Namely, if it produces less than 900 rpm.

Fans of turbocharged boilers are another weak point of any such unit. Therefore, you should always be prepared to repair or replace it.

If this fact is confirmed during diagnostics, the fan must be replaced.

Blockage due to coolant overheating

Codes errors 27, E18/E19 indicate that the boiler is blocked due to overheating. Moreover, it is caused by disturbances in the process of fluid circulation in the system.

The reasons that triggered the appearance of this warning signal include:

• airing the heating system. To eliminate it, it is necessary to remove excess air;
• valves closed position;
• jamming or breakage circulation pump. In the first case, its impeller must be cleaned of dirt and foreign particles, which in many cases returns the product to operability. If damaged, replacement will be required;
• filters are dirty and should be removed and inspected. If the suspicion is confirmed, the filter element should be cleaned. In such cases, the cause of contamination is often ferric iron (rust particles), which is effectively removed by soaking in a solution of citric acid;
• contamination of the heat exchanger channels, which during operation become covered with a layer of scale similar to what is deposited on the walls of kettles (in regions with hard water). As a result, after every couple of years of use of the boiler, its heat exchanger should be cleaned.

Cleaning the heat exchanger can be done mechanically, that is, using brushes and other similar devices, as well as using special equipment and chemical reagents.

You can read a detailed article on cleaning the heat exchanger of a gas boiler Here.

In case of errors with numbers E18/E19, one of the solutions to restore the boiler’s functionality may be to add water to the system.This is easy to do, since all you need to do is open the special valve on the control panel

Error codes b 24, b 30 on the display indicate that the thermistors in the supply and return lines are producing different values, with a difference of 10 °C.

This problem is eliminated by cleaning the heat exchanger from scale and other deposits.

Error code b 25 indicates that the temperature of the coolant in the supply line is rising rapidly. Typically, such a signal indicates an insufficient amount of liquid in the heating system, which is eliminated by topping up.

Signals about system depressurization

Codes errors 28, b 26 indicate that an unpleasant malfunction such as a leak has occurred in the hot water supply circuit of the Immergas gas boiler. Moreover, with a simultaneous increase in temperature in the hot water supply and heating circuits.

The cause of low coolant pressure in the system can be any faulty mixer. Therefore, in the case when error code 28 is displayed, you need to pay attention to them first.

To identify the problem, the first thing you should pay attention to is the serviceability of the mixers. If no leak is found, then you should inspect the entire heating system (pipes, radiators, connections) to identify leaks.

Code errors 10 will appear if in the heating circuit of the boiler pressure decreased below the set level, which is usually 0.9 bar.

Initially, it is recommended to restart the unit again, and if the presence of a malfunction is confirmed, then the location of the depressurization of the circuit should be identified.

This procedure can be performed by visual inspection.In this case, you should remember that replacing the leaking part will be the most practical solution.

After restoring the tightness of the circuit, it must be filled with coolant.

To do this, you should use the so-called recharge lever. To achieve the desired result, it must be turned counterclockwise, after which water from the centralized system can enter the heating circuit of the boiler.

A common cause of leaks is the joints of heating system structural elements. This is especially true for radiators and pipes

The filling procedure stops when the pressure reaches 1.3 bar by turning the refill lever to its original position.

Unstable operation of the electrical network

Code errors 37 is a warning that there are significant voltage surges in the network, with its reduction to critical values ​​(175-197 V).

The consequences of this problem can only be eliminated by installing voltage stabilizer, and of high quality.

Other types of errors

Code errors 15 indicates an incorrect boiler configuration. In this case, it is strongly recommended to contact a service center.

Code errors 20 warns of the presence of parasitic flames. And the danger of the situation is that it often occurs in the event of a gas leak.

Therefore, when code 20 is detected on the display, it is necessary to turn off the gas supply, and then open the windows for ventilation, and then make sure that there is no leakage, which is detected by the specific unpleasant odor of special gas additives.

If the presence of a leak is confirmed, then the gas station duty service must be notified immediately.If there is no danger, then you should contact a service center to eliminate the causes.

E04 - the most unpleasant code, which indicates that there is a malfunction, but its cause has not been identified.

Error code E04 mostly indicates that the electronics have not identified the source of the problem. Therefore, it is only clear that it is serious, since in this case the automation does not even try to restart

Therefore, you can immediately call a specialist to your home, since eliminating the consequences may require diagnostics of all systems and components of the unit.

Code errors 08 indicates a malfunction of the gas boiler unlock key. This problem is usually eliminated by replacing the failed structural element.

Code errors 09 on the display indicates that the gas boiler setting mode is activated, and its cancellation will signal the disappearance of the specified set of numbers from the display.

Code errors 31 is rare, as it indicates that the electronic board is incompatible with the model of the boiler on which it was installed. That is, this problem usually occurs after a replacement is performed.

Electronic boards of modern gas boilers are designed for effective monitoring and control, but it often happens that they themselves break down

Sometimes code 31 is displayed after incorrectly entering the name of the boiler model during assembly. Therefore, this procedure should be repeated. If functionality is not restored, the board should be replaced again.

Conclusions and useful video on the topic

From the first video you can learn how to fix error number 02:

The following video explains how to resolve error 01:

Immergas boilers are high-tech and efficient gas equipment. In addition, they are safe to use, as evidenced by the ability to diagnose operational problems and alert the user to them by displaying the appropriate code on the screen. This helps to avoid danger, as well as quickly eliminate damage.

Have you ever encountered breakdowns of Immergaz boilers? Please share with our readers what kind of equipment error you encountered and how you managed to fix the problem. Leave your comments in the block below the article.