Repair of electronic boards of gas boilers by yourself and in the workshop

During the colder months, it can be very disruptive to your daily schedule when your gas boiler malfunctions. One of the most frequent problems that homeowners deal with is a broken circuit board. This crucial part regulates the boiler’s operations, and if something goes wrong, the heating system as a whole may be affected. But do not worry! Gaining an understanding of the gas boiler circuit board repair procedure can help remove any mystery surrounding it and restore warmth and coziness to your home.

First things first: you need to be aware of the warning indications that your gas boiler’s circuit board is malfunctioning. A circuit board failure is likely if you observe odd noises, intermittent heating, or flashing error codes on the display. Ignoring these signs may result in future damage and possibly higher repair expenses. So, it’s imperative that the problem be resolved quickly.

It is recommended that you leave gas boiler circuit board repairs to the experts. Skilled technicians possess the knowledge and tools required to precisely identify the issue and carry out the repair in a safe manner. Not only can it be risky, but trying to fix the circuit board yourself could void your boiler’s warranty. So, instead of giving in to the urge to do it yourself, hire experts.

The boiler and its circuit board are usually thoroughly inspected before beginning any repairs. The board will be thoroughly examined by technicians to look for any obvious damage, such as burned parts or loose connections. To test the board’s operation and determine the problem’s underlying cause, they might also employ specialist equipment. Repair work can start as soon as the issue has been identified.

The methods used to repair a gas boiler circuit board can vary depending on the degree of damage. Sometimes simple fixes are all that’s needed, like soldering a loose connection or swapping out a malfunctioning part. Nevertheless, the board might need to be replaced entirely if it is seriously damaged or irreparable. Based on their evaluation, the technician will recommend the best course of action to you.

Following the completion of the repair or replacement, the technician will carefully test the boiler to make sure it is operating as intended. They will ensure that the boiler is heating properly, keep an eye on its operation, and confirm that all error codes have been fixed. Ensuring the efficacy and security of the repair is contingent upon the testing phase. You can exhale with relief once everything is verified and your gas boiler is operational again.

Contents

Why the control board fails
Signs of breakage of the gas boiler unit board
Repair of the electronic control board of the boiler by yourself
Repair of electronic circuit boards by specialists
Video on the topic
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Why the control board fails

The board must continuously check that all of the boiler’s sensors and actuators are operating under extremely harsh circumstances. This guarantees that the device will function within permissible limits for performance, temperature, and media pressure.

When it detects anomalies, such as variations in air pressure brought on by a malfunctioning fan or clogged flue, it stops the burner’s gas supply and flashes a fault code until it can no longer be adjusted.

Error codes aid in the speedy fault-solving process for boiler repair services. This lowers boiler repair costs and expedites repairs compared to starting from scratch.

The boiler’s own blocking is regarded as a safety precaution to guard against harm to pricey parts, like the boiler heat exchanger.

Boiler board failure causes include:

A leaking boiler, pump or cracked heat exchanger, increase the humidity inside the structure and the process of condensation, on the elements of the board.
Cracks and fractures in the circuit board.
Weak or damaged solder joints.
Degradation of circuit components: dried capacitor with increased ESR in a switching PSU.
EEPROM memory errors.
Voltage surges in the power grid, in case when a voltage stabilizer or uninterruptible voltage source is not switched on before the unit. Then any technical failure in the substation from poor grounding, burning "0" or lightning discharge can damage the circuit board.
Failure of production, after which it will be impossible to adjust the boiler operation.
Unprofessional repair.
Boiler vibration, the board components are extremely fragile. Excessive vibration can cause the unit"s chip and connections to the circuit board to degrade and damage the wiring. Before repairing it, the vibration should be eliminated. The most obvious components to check are both the pump and the fan.
Technical wear and tear, after 14 years of operation.

In "How a Gas Boiler Circuit Board Repair is Carried Out," we explore the fundamental procedure involved in repairing one of the most important parts of a gas boiler system. By breaking down the process step-by-step, we hope to help both technicians and homeowners understand the repair process. This comprehensive guide offers helpful advice on how to keep your heating system operating efficiently, covering everything from identifying common problems to finding replacement parts and carrying out repairs safely. By providing readers with comprehensive instructions and troubleshooting tips, we enable them to confidently address circuit board issues, thereby enhancing comfort and safety in their homes.

Signs of breakage of the gas boiler unit board

The display panel’s sporadic operation is the first indication that the electronic board of the device is malfunctioning. As a result, the LED indicators blink on and off, and occasionally the control panel stops working.

Damage to the wiring that connects the circuit board to the user interface is most likely the root of this issue. By gaining access to the rear of the display panel, the service engineer can visually inspect the connections and wiring.

They will have to fix or reattach any connections that show clear indications of being loose or damaged.

Most typical indicators of an electronic board failure are:

The boiler shuts down before the coolant reaches operating temperature, it is constantly on/off, which puts undue pressure on the boiler components. The specialist must check the condition of wiring and connections with NTC thermistors.
The fan does not start or runs with wire overheating continuously, while the technical condition of the circuit components is satisfactory.
The gas valve does not open during ignition, with normal parameters in the gas network and its operability. The service engineer should first check the communication line between the gas valve and the board. Possible failure may also be related to the fan. Once the board recognizes that the fan is working and therefore removing harmful gases from the boiler, it will command the gas valve to open, thus ensuring a steady supply of gas to the burner.
PCB (power control unit) shows a memory error by displaying the corresponding failure code on the display panel. This is a memory fault and is due to incorrect PCB configuration. These errors occur when a new circuit board is installed where the boiler code has not been entered for data exchange.
PCB is not responding. Although there are dozens of different boilers using the same type of circuit board, but it may happen that the new board will not work without the correct boiler chip card. The chip card itself may also be defective. The service engineer must remove the boiler casing to get to it and check if it is inserted correctly. These are fragile parts, so the slightest vibration of the boiler could dislodge it from its working place. Then they check it and put it back in its place.
If the boiler smokes and fault codes appear on the display, it is likely that the board has been damaged by water and requires repair or complete replacement.
No power supply on the printed circuit board or display panel, requires complete replacement of the printed circuit board.

Repair of the electronic control board of the boiler by yourself

People hardly ever perform such repairs; this isn’t because they can’t, but rather because they aren’t financially viable.

Electronic boards that have been repaired need to be tested using apparatus that is far more costly than the board itself. As a result, nobody will purchase such equipment for sporadic use.

A formal guarantee and conclusion on such repairs will also be necessary for the boiler’s operability and continued service under the terms of the contract. Only service centers are able to provide these, as they have previously received certification from the boiler’s manufacturer regarding their ability to perform this kind of work with quality.

Repair of electronic circuit boards by specialists

When selecting a service provider to fix the boards, confirm that the company is authorized to work on a specific boiler model.

Finding out the company’s work schedule is the next step; ideally, it will allow you to work from home. The business will next closely examine the unit’s operation and the likelihood of auxiliary equipment failure before replacing the circuit board.

The service technician needs a diaphanometer, gas analyzer, and a few research and repair tools in order to work from home. By conducting diagnostics on the pump, fan, and electrical circuit supply, he finds a failure based on the survey results.

The technician should have a spare boiler board for this model in his repair kit, which he uses to replace the damaged one. This type of repair takes about two hours, and it’s crucial to avoid chilling the premises during the winter months.

A thorough diagnosis of the board is performed in the workshop using a dedicated stand that mimics the functions of a specific boiler unit and uses specialized software to repair malfunctions.

We also make use of an oscilloscope, a logic analyzer, and a thermal imager. With the aid of this repair technology, you can identify software malfunctions, set "floating" defects, and identify power grid surges.

Extended testing allows for the detection and correction of every little detail related to the operation of electronics. In a good workshop, 70% of board failures are eliminated in the first day; if you need spare parts, delivery may take two to three days; if parts are needed from overseas, repair times may exceed two weeks. Ninety percent of boards are recoverable, as practice demonstrates.

Initial diagnostics is carried out – up to 500 rubles.
The results determine the full cost of repair work. Average price for units up to 16 kW from 3000 rubles., more than 20 kW – from 4000 rubles.
Installation of the board of the boiler Ariston – from 1500 rubles.
Payment is made upon completion of the repair, upon confirmation of the operability of the board.
Additionally, the cost of transportation services, within the Moscow Ring Road – 1000 rubles., surcharge for 1 km from the Moscow Ring Road – 30 rubles.
Warranty for 6 months is provided.

In actuality, the repaired boiler control board can last much longer, even though the service center only offers a six-month warranty.

Since 2014, cheap parts are used in the boards of the majority of Western producers of heating boilers, particularly if the boilers are assembled abroad.

After repair, the board is frequently of higher quality than the original because service centers are accredited by manufacturers and brand owners, who demand the use of original spare parts.

Step	Description
1	Diagnose the issue by checking for error codes or abnormal behavior.
2	Power off the boiler and disconnect it from the mains.
3	Open the boiler casing carefully.
4	Locate the circuit board inside the boiler.
5	Inspect the circuit board for visible damage such as burnt components or loose connections.
6	If possible, attempt to reset the circuit board.
7	Check for any blown fuses on the circuit board.
8	Use a multimeter to test for continuity and voltage across critical components.
9	Replace any faulty components if necessary.
10	Reassemble the boiler casing.
11	Power on the boiler and test for proper functionality.

Maintaining the effective and secure functioning of your heating system requires doing necessary repairs to the circuit board of your gas boiler. Due to contemporary technological developments, these circuit boards have developed into complex parts that control the boiler’s operations, necessitating specialized maintenance.

The first step in identifying and fixing problems with gas boiler circuit boards is to understand the common problems that can occur. Defective connections, broken parts, or software bugs are all possible causes of malfunctions, and knowledgeable technicians use diagnostic tools and methods to identify the problem precisely.

After the issue has been located, the repair procedure necessitates painstaking attention to detail. The boiler is carefully disassembled by technicians, who then examine the circuit board for any obvious damage or problems. To fix the problem, they might have to replace broken parts, solder connections, or reprogram the software.

During the repair process, safety is of the utmost importance. Strict safety procedures must be followed when working with gas appliances in order to avoid mishaps and guarantee the health and safety of both technicians and residents. Experts with the necessary training are equipped to handle gas boiler repairs with the utmost care and skill.

To maximize the life and performance of your gas boiler, regular maintenance and timely repairs are necessary. Homeowners can prevent expensive malfunctions and make sure their heating system runs effectively, keeping their house warm and cozy all year round, by taking quick care of circuit board problems.