How to check the ignition transformer of a gas boiler

The information in the section of the factory manual about malfunctions of Korean heating units does not give the user much in practical terms. Error 03 of the Navien gas boiler is described briefly: lack of gas supply to the burner. The recommendation is clear: make sure that the tap is in the open position. It is understood that if this is the case, you will have to contact a specialist. Is it always needed? The article explains how to independently find and eliminate the reason for the appearance of code 03 of the Navien boiler.

Valve in closed position

Error interpretation

Blocking the gas path is a primitive interpretation of the problem that has arisen. The manufacturer does not specifically indicate all probable causes of a malfunction to exclude user intervention. The Navien boiler is complex equipment, and given the type of fuel, it is also explosive. This explains the minimum information in the documentation on how to independently fix a problem with a heating installation.

Error 03 should be understood as follows: the ionization sensor does not “see” the flame. That is, either gas does not flow to the burner, or there is no ignition. Knowing this, it is not difficult to develop an algorithm for eliminating error 03 of the Navien boiler.

Expert opinion

01E

The code indicates overheating. To prevent boiling of the coolant and thermal deformation of parts, the automation stops Navien until the cause is eliminated.

Check

• Extract temperature sensor (heating). If the signal line is not damaged, it is tested for operation.
• Circulation pump: does not function correctly or has stopped. It is necessary to ensure the integrity of the connecting wires, the reliability of the contacts and the presence (correspondence to the nominal value) of the supply voltage. These are the most common reasons that cause an error on the boiler display. A problem with the pump may arise due to the lack of free movement of the impeller. Salt deposits on the blades and shaft oxidation are the result of increased hardness of the pumped medium and poor quality water treatment.
• Presence/absence of plugs in the heating circuit. You should not rely on valves installed on radiators that automatically remove air from the system - dust and dirt often clog the channel, and the device does not perform its function. Try to bleed it manually: if water comes out, then the Navien error is caused by another reason.

Diagram of Navien boiler devices
Overheating of the boiler occurs due to a decrease in the coolant circulation rate. This is also possible if the heat exchanger is clogged (error 16E ). Following recommendations from the category “in everyday life, on your own” will not give the desired effect. Even if you manage to prepare the special solution/solution correctly, you will not be able to completely clean the cavity of the device. The liquid circulation channel has a complex configuration - in the workshop, washing is carried out under pressure.

Line diagnostics

A problem with the gas supply to the Navien boiler is expressed in a blockage of the path or low pressure. The method for searching for the “culprit” of error 03 depends on the connection diagram of the unit to the main line or tank with “blue fuel”. If the building has a gas stove, the task is simplified . You can determine if there are problems in the pipeline by igniting the burner.

It is also easy to check the pressure by turning on all of them: by the intensity of the flames and their stability, it will become clear whether it is sufficient for the normal functioning of the equipment. For gas boilers, and Navien is no exception, there is a lower response threshold. And if gas flows, but the pressure in the line is below critical, error 03 is inevitable.

For objects without a stove or with a Navien boiler connected via a separate line, the following procedure for diagnosing system elements is recommended.

Shut-off valve controls

• After the Navien boiler is taken out of operation for some period,
  the gas path must be shut off , which is what most users do. But before starting up the heating installation, many people forget that the pipeline themselves was blocked.
• If a shut-off valve is installed at the facility, when the voltage on the line is turned off, it is activated; cocked manually.

Solenoid shut-off valve

Counter

non-working meter also causes error 03 of the Navien boiler. It is sealed, but the user can verify its normal functioning visually. You need to try to turn on some kind of gas appliance to ensure the consumption of “blue fuel”.

Filter

Its mesh needs regular cleaning . During operation of the Navien boiler, the cells become clogged with ice and other solid fractions deposited along the pipe. Pulling the mesh out of the glass, rinsing it and putting it back in place takes just a few minutes.

Navien boiler heating system water filter. It is necessary to systematically clean the filter, since its contamination is one of the reasons for boiler overheating and error 02

Storage tank

With an autonomous gas supply, the Navien boiler is connected to a gas holder or cylinder group. If we are not talking about maximum fuel consumption, the cause of error 03 is the gearbox. Typical faults: icing or dirt blocking the channel. In any case, solving the problem is not difficult.

Gas boiler Navien, main faults and their elimination

Do-it-yourself repairs require certain knowledge and skills in working with gas equipment. There is a special manual that describes the main fault codes. There are no repair instructions provided for users. The manufacturer assumes that troubleshooting will be carried out exclusively by service centers.

Read more ⇒ Procedure for checking gas equipment

But many breakdowns can be fixed on your own without wasting time and money on a professional technician. To do this, it is enough to familiarize yourself with the main malfunctions and their elimination.

Navien gas boiler does not start

If the system does not turn on the control panel, then the problem is usually a lack of power from the electrical network. If the power supply is turned off by utilities, you should wait until the supply is restored. To understand how to turn on the equipment, just plug the cord into an outlet.

A common problem is the gas boiler turning on and off frequently.

Read more: Why does a gas boiler go out? Main reasons

The source of the malfunction is an incorrectly installed circulation pump. The heating often turns off when the temperature range is incorrect. Also, the equipment turns on and off every 5-7 minutes in the absence of a thermostat.

The Navien boiler does not reach the set temperature

The most common malfunction of a Navien gas boiler is that the system does not heat up to the specified parameters. To fix the problem, you need to clean the heat exchanger using household plumbing chemicals or specialized compounds. To do this, the device is dismantled, the selected solution is poured into it, after which the part is thoroughly washed with a large amount of water. If the boiler does not heat hot water, then you can clean the heat exchanger of the DHW circuit in the same way.

The Navien boiler quickly gains and drops temperature

If the Navien gas boiler quickly heats up and cools down, then the fault should be sought in the heating system. You can adjust the pump speed to force fluid movement or remove air pockets.

During diagnostics, it is necessary to inspect the filtration system and the lumen of the heat exchanger. You may also need to replace the antifreeze. Spare parts for Navien gas boilers are freely available - they can be ordered online or purchased in a specialized store.

What to do if the boiler is humming

Navien ace 16k, 13 and other models hum when the heat exchanger is dirty. To fix the problem, you need to remove the device and clean it. A frequent failure occurs when a gas boiler bangs when ignited. The cause of the malfunction is late ignition of the gas. To get rid of the loud sound, you need to clean the burner or increase the ignition gap.

Malfunction of the boiler ventilation system

If you do not use Navien Deluxe floor or wall heating equipment for a long time, a lot of dust accumulates inside, which negatively affects the operation of the fan. To fix the problem, you will need to clean and lubricate the system.

Control board malfunctions

The control board often causes boiler malfunction. The difficulty with such a failure is that it is difficult to determine on your own, so it is better to contact a professional repairman. To prevent the problem, it is necessary to install a voltage stabilizer in the power supply circuit of the heating equipment.

Water oversaturated with oxygen

During natural circulation, water bubbles form, which burst and cause noisy operation of Navien Ice 24 and other models. If you add membranes to the system, the problem will disappear.

Hard water sediment

Scale accumulates on the walls of the heat exchanger of a wall-mounted or floor heating device, gradually narrowing the passages for water supply, so a strange hum appears when the Navien ace 24 k or deluxe 16k is operating. To get rid of the malfunction, you need to wash all parts with an acid solution.

What to do if the aspirated air leaks

In Navien ace gas boilers, leaks are caused by a breakdown of the heat exchanger. You can try to solder the fistula or buy a new device.

Pressure failures

Failures in water pressure of Navien heating devices are usually associated with leaks. The coolant penetrates into all small cracks, which affects the operation of the equipment. Also, the reasons include a malfunction of the three-way valve or secondary heat exchanger.

Why does the pressure drop, what should it be, setting the pressure

If the water pressure in the system drops, this indicates a leak in the boiler, pipes or batteries. To fix the problem, you need to open the valve, turn on the heating equipment and carefully inspect each element of the system.

Read right now:⇒ How to find and fix a leak in your heating system

When searching for a possible malfunction, focus on the intensity of the pressure drop. Liquid may enter the expansion tank where the membrane is damaged. The cause is often a worn safety valve. The only way to increase the pressure is to find and fix the leak and replace damaged parts.

Pressure jumps in the heating system

When the pressure in the heating system fluctuates, you need to look for the cause in the three-way valve. Antifreeze penetrates the heating circuit, thereby raising the indicator. In this case, replacement or repair of the three-way valve of the Navien gas boiler is required.

Why is blood pressure rising?

The source of the problem, why the pressure in the Navien gas boiler increases, lies in the secondary heat exchanger. The safety valve reacts first. The hot liquid is heated by the already hot heating system. Antifreezes do not mix, but simply exchange heat.

But when a fistula occurs, water from the hot water supply enters the heating system and the pressure begins to rise to match the indicators of household liquid. To get rid of the problem, you will have to replace the heat exchange device. Repairing this element for a Navien gas boiler is difficult and economically unprofitable.

Equipment diagnostics

Ionization sensor

When looking for the cause of error 03 in the Navien boiler, you need to start with the measuring device. Repair practice shows that most often this is the culprit.

Possible defects

• Problems with the signal line. Error 03 Navien can be initiated by a wire break, damage to its insulation (and therefore a short circuit to the boiler body or to each other) and unreliable contact (oxidation of the lamellas, loose fitting of the plug). It’s easy to visually identify the defect and fix it yourself.

The sensor grounding wire (housing) requires special attention A feature of the Navien boiler circuit, which not everyone knows about, is the inclusion of resistance in this circuit. It happens that the resistor burns out , the line breaks, and error 03 is displayed. You can check for integrity with a multimeter: when measuring, the device should show R within 0.5 MOhm.

• Electrode contamination. You need to unscrew the fasteners, remove the assembly from the socket and clean the measuring element from carbon deposits, soot, and stuck-on dust.

• 
  Navien boiler ionization sensor

• 
  Location of the ionization sensor in the Navien boiler

Ignition transformer

In the boiler, Navien is located under the electrode assembly. Burnout (break) of the TP winding also causes error 03 to appear. Continuity testing is simple: with a multimeter with the “kOhm” mode set.

Gas valve

Error 03 is triggered by a problem with one of the 3 coils. As a rule, modulation has nothing to do with it: combustion of its winding is an exceptional case. But two shut-off valves in Navien boilers sometimes fail.

Error 03 of the Navien boiler, initiated by a problem with one of the 3 coils

Suitability test

• When the heating system is turned on, two characteristic clicks should be heard. If there is only one, then some shut-off coil is faulty.
• The windings are checked, as when testing a transformer, with a multimeter. It should show a resistance of about 5.6 kOhm.

The appearance of error 03 Navien may be caused by a malfunction of the boiler electronic board . But it is tested for functionality and repaired only in a service workshop. On your own, without experience, relevant circuits and instruments, it is better not to experiment, but to immediately turn to professionals.

Thermocouple

This device is one of the few that can measure high temperature. It is both simple and yet reliable. A thermocouple is made of two wires of different metals that are connected at different points. All this makes it possible to use it for different purposes. The main disadvantage is the error of one degree. To ordinary people this seems insignificant. But for such devices, many consider such indicators to be simply gigantic.

The device is used as a fuse. It measures the temperature in the heating pad. If it starts to fall quickly (say, for some reason the fire goes out or there are problems with the smoke exhaust), the system is triggered, which sends a signal to the solenoid valve and the gas supply stops. Therefore, if this component does not work, the equipment is inoperative.

Sequence of actions for checking:

1. The thermocouple has two ends, the first of which is heated by the igniter, and the second is attached to the solenoid valve. It is necessary to separate the device from the boiler, be it a regular one or a condensing one with a three-way valve.
2. Then provide a constant flame. A candle is best.
3. Heat the tip above the flame at a distance of 1 cm. Just be careful, as the heat can reach half of the body.
4. We take the tester and turn it on to millivolts. One probe is placed on the body, and the second on the output contact.
5. After half a minute, a working thermocouple will show the EMF in the range from 17 to 25 mV. If the indicators are normal, then the problem of a non-working system may be elsewhere.

Useful tips

• The instructions for Navien gas boilers note the stability of their operation when the supply voltage is unstable, hence the minimal list of errors.
  This is ensured by the presence of a security chip in the microprocessor - one of the features of Navien models. But what to do if there is an emergency on the line? For objects located in rural areas, the question is far from idle. Experts recommend turning on the heating unit via a UPS. The unit contains a stabilization circuit, a group of batteries, and a charger. In the event of a power line break, problems at a substation, or with starting a backup generator, an autonomous source will ensure stable, continuous operation of the Navien boiler for several hours (the period is determined by the total capacity of the battery).

• When contacting a specialized organization, you need to clarify whether it is certified by the Navien boiler manufacturer. Otherwise, you will have to face a number of problems, and eliminating error 03 will be expensive. “Simply Workshop” pays for spare parts like everyone else: in retail outlets, via the Internet. And this is time and extra money. As for detailed instructions for testing and troubleshooting Navien boilers, the manufacturer supplies them only to its service centers. This means that specialists from a third-party organization will not be able to do the work really well.

[/vc_column][/vc_row][/vc_column][/vc_row]

Did you like the article? A repost will be the best thanks.

Classification of Navien boilers

Gas units of the South Korean brand differ in their installation location and operating principle; accordingly, the error codes stated by the manufacturer in the instructions also differ and may change as new models appear on the market. Let's consider current offers.

Gas-powered models come in two types: wall-mounted and floor-mounted. Wall-mounted units, in turn, are divided into two categories: traditional and condensing.

Traditional series:

• DELUXE;
• DELUXE S;
• DELUXE Comfort;
• ACE (atmo);
• DELUXE PLUS;
• SMART TOK.

Condensation series:

• NCB 700;
• NFB-98H;
• NPE;
• NCB 52-H.

Currently, only 2 series of floor-standing boilers are produced:

• GA;
• GST.

All models from this manufacturer have a whole list of advantages that have made the brand popular in Russia. According to surveys of users who have been using the technology for a long time, 4 main advantages can be identified:

The assortment is constantly changing: old models are being replaced by updated, more advanced ones. Not long ago, the SMART TOK wall-mounted boiler appeared, which can be controlled directly from a smartphone. The “smart” series has 6 options with power from 13 to 35 kW, and you can choose a comfortable mode right on the way home from work.

02E

Pressure drop in the heating system. The error indicates a leak in the circuit, the boiler itself or installed devices (hydraulic accumulator, filters).

Check

• No puddles on the floor. Particular attention is paid to the joints.
• Circulation pump. Deformation of the blades and their damage affect the speed of fluid movement, hence the error on the boiler display.

Navien circulation pump

27E

An error typical for Navien atmospheric models. Caused by a malfunction of the air sensor (APS) or lack of communication between it and the boiler board.

Other codes are also displayed on the Navien display. But almost all such malfunctions are associated with the boiler’s electronic board. The only thing you can do yourself is to make sure that the contacts are tight and correct the connectors on the module. It cannot be repaired, especially at home.

Navien boiler control panel

Useful tips

• Before removing the casing of the Navien boiler and trying to solve the problem with it yourself, you should make sure that the warranty for the sample has expired (according to the mark in its passport). If it works, you need to call specialists from a service organization - you won’t have to pay for repairs.
• The risks of Navien errors can be minimized by proper arrangement of the heating system: power supply to the boiler via a UPS, high-quality water treatment, filters on the pipes of connected communications. Plus – professional installation of equipment.
• Navien boilers break down extremely rarely. If errors appear on the display, you should immediately check the corresponding sensors and connecting wires. In 85% of cases, the reason is precisely in them or in external factors (mismatch of parameters of house systems; for example, pressure in the main line).

The documentation for Navien heating installations contains scant information, including information on errors that appear. the user to contact an affiliated service center in case of problems with the operation of the equipment. This must be taken into account when calling a specialist. It’s not a fact that this department has manuals for repairing Navien boilers!!!

Other faults

There are also malfunctions in the operation of the boiler, during which information about the malfunction is not displayed on the display. The boiler does not turn off after reaching the set temperature. This happens most often in cases where the heated room is poorly insulated and all the heat goes outside. In addition, you can try changing the modulation value and thereby changing the minimum power.

Flushing the heat exchanger

Loud noise can occur when there is a large amount of scale in the heat exchangers. The remedy is to remove the heat exchanger and clean it. Insufficient water heating can also be caused by this reason.

During normal operation of the boiler there is no hot water in the taps. This may be caused by a faulty three-way valve. The average valve service life is no more than 4 years. As a rule, repairs and cleaning do not give results; replacement is needed.

In conclusion, we suggest watching a video about the most common errors of Navien boilers:

The boiler does not heat water

This video is the solution to your problem!

Watch to the end and you won’t need to call a specialist.

It is impossible to survive without boiler houses in the climatic zones of Russia. Moreover, this also applies to the warmest regions, Sochi, Anapa and Rostov-on-Don. Winters are still harsh and people cannot survive without heating. Therefore, it will definitely not be possible to do without heating systems and hot water. And only boiler houses can provide the city with all this. Today we will look at the reasons why the boiler does not heat the water - how to solve this problem and what to do about it......

They are very different. It all depends on the heat source. It can be either steam or water. They may vary by location. If the house itself decided to build its own boiler room, then a specially separate room in the house can be allocated for it. Or extensions are made to the house for these purposes. One of the main requirements when constructing boiler houses is good ventilation.

If the boiler operates with steam, then very high demands are placed on the quality of water purification, and then steam. Therefore, it will definitely not be possible to manage such boiler houses without a whole complex of cleaning installations. This also includes AquaShield electromagnetic softeners, which are highly valued by boiler house employees today.

If a gas boiler suddenly stops heating water, the reasons may be different, but most often when using water from a central water supply without softening units, the cause may be limescale deposits. Moreover, it is hard and difficult to remove. The table shows possible signs of the reason why the boiler stops due to scale formation.

Other reasons for boiler shutdown are simpler. A piece of scale may also get stuck in the pipe and block normal operation, and a crack in the gas boiler may also contribute to the shutdown. But in these cases there will definitely be no scale residues on the walls of the equipment. If the boiler room does not have boiler water softeners or treatment facilities installed, then the root cause will of course be water hardness. If the treatment plant is standing and the equipment has been checked recently, then most likely this is not the problem.

If the video did not help you, then try installing anti-scale filters (polyphosphate or electromagnetic) in front of the boiler. Because Hard water and scale are the root cause of malfunctions and breakdowns of gas boilers!

In any case, if there is no cleaning in the system, then you will have to urgently address this cause and solve it. For boiler houses there is a whole range of water softening devices that are suitable:

• AquaShield;
• Ultrafiltration and conditioning for steam boiler houses;
• Ion exchange for economical consumers of gas boilers

The most wasteful process of cleaning and softening will be in steam boiler rooms. There you will have to remove not just all organic and inorganic impurities. Even dissolved gases will have to be removed. Degassing is quite troublesome and costly. But the operation of the boiler depends on the quality of the steam. This is where membrane softeners work to make the water completely isolated.

Many consumers of gas boilers choose AquaShield for the simple reason that it does not require maintenance and does not require spending money on it. But its biggest advantage for boiler equipment was and remains the ability to remove old lime deposits even in the most difficult places. Usually, to eliminate such residues, the equipment needs to be unscrewed, the parts need to be soaked in aggressive acidic environments and kept there for up to two hours. But even after boiler treatment of water, it is necessary to clean the surfaces with metal brushes or cleaners. If your gas boiler does not heat the water to the required temperature, then the reason is scale deposits. The electromagnet does all this work without damaging the surface, at the molecular level.

To summarize

Thus, you can eliminate error 02 yourself. To do this, you need to understand a little about how the equipment works. Carefully read the operating instructions, which indicate possible causes that could lead to boiler malfunctions and ways to solve them. In most cases, errors occur due to a glitch in the software. It is because of this that malfunctions occur. Therefore, it is necessary to periodically diagnose equipment in order to detect problems in time and quickly eliminate them. Another common reason is a breakdown of the relay or sensors, in which case the spare part needs to be replaced. parts. After this, the Navien boiler will work like new.

We hope that this article will help you understand error 02 on your heating equipment. We wish you good luck with the renovation!

Rules of operation and timely maintenance

When purchasing a gas unit to heat your apartment or private home, you should remember that modern devices belong to the category of complex, high-tech, full of automation and protective systems. Therefore, in order to extend the life of the boiler and prevent its premature failure, it is necessary to follow certain operating rules.

1. Firstly, this is installation in accordance with established requirements, according to the scheme recommended by the manufacturer, and not based on the advice of a familiar master.
2. Secondly, these are high-quality materials and components: savings at this stage threaten to develop into financial costs for boiler repairs in the future.
3. Thirdly, this is a thorough check of the condition of the sensors, chimney, water/gas supply before starting the boiler. Inspection and cleaning of main components should be done regularly, and not occasionally.

The automation will tell you the probable causes of problems by displaying coded messages on the display. Experience shows that following these recommendations will help avoid possible serious breakdowns and failures, which means that owners will not have to find out what typical malfunctions the Navienace boiler has and what will be required to eliminate them.