How to fix the error 16 boiler Navien – common causes of breakdowns

The unsung heroes of our homes are the boilers, which quietly operate to keep us warm and comfortable when the weather gets chilly. However, what occurs if they abruptly interfere with our intentions by displaying an error code, such as the notorious Error 16 on Navien boilers? It’s an annoying situation that sometimes leaves us perplexed, wondering what went wrong and how to fix it. We’ll examine the typical causes of Error 16 in this guide, along with workable fixes to restore your Navien boiler to full functionality.

Let’s start by deconstructing Error 16. This mysterious code is Navien’s method of alerting you to a problem with your boiler system. It functions similarly to a warning light on your car’s dashboard, alerting you to the need for maintenance in order to avert more problems later on. Error 16 is generally not a reason for alarm, even though it can be annoying. If you have some troubleshooting skills, you can usually fix the problem without hiring a pricey professional.

Poor ventilation is one of the most frequent causes of Error 16. For optimal operation, your boiler requires a constant flow of fresh air; if its vents are obstructed or restricted, this can cause overheating and result in an error code. Anything from an improper installation in a small space to a buildup of debris around the vents could be the cause of this. The first step in fixing Error 16 is as easy as checking and cleaning the vents.

Low water pressure is another possible source of Error 16. For proper operation, your Navien boiler needs enough water flow; if the pressure drops too much, the boiler may generate an error code and shut down. Leaks in the system, a malfunctioning pressure relief valve, or problems with the water supply itself are common causes of low water pressure. You can take direct action against this problem by looking for leaks and making sure there is enough water pressure.

Trouble with Error 16 can also arise from electrical issues. There are various electrical gremlins that can interfere with your boiler’s operation and result in the dreaded error code, such as bad wiring or malfunctioning sensors. Even though electrical problems can be more difficult to identify and resolve, they can be overcome with the appropriate strategy. You can usually diagnose the issue by looking over the wiring, testing the sensors, and, if needed, resetting the system.

Naturally, there might be situations in which doing your own troubleshooting is insufficient to permanently remove Error 16. When this happens, it might be time to call in a professional technician. An expert heating engineer can carry out a comprehensive examination of your Navien boiler, identify the root cause of the problem, and carry out the required maintenance or replacements. Even though this approach could cost money, it’s frequently the best way to guarantee that your boiler is restored to peak performance.

In conclusion, while Error 16 on Navien boilers may appear to be a formidable barrier, it is surmountable with a methodical approach and a little tenacity. You can fix common problems like low water pressure, electrical faults, and ventilation problems to troubleshoot Error 16 and get your home warm and comfortable again. And don’t be afraid to seek professional help from the pros if everything else fails. A comfortable home is worth the work, after all.

Error 16 – what does it mean

The manufacturer’s instructions state that the overheating of the heat exchanger is the possible cause of error 16 on the device display. In the event that such a procedure occurs, the boiler is disconnected and the emergency thermostat instantly sends the signal to the electronic board. Coolant that is either too little or moves too slowly through the heating circuit can cause overheating.

What can be done at the initial stage

Calling the master immediately is not necessary if error 16 is displayed. You can attempt to handle the issue on your own. Start by doing the following actions:

1. The boiler must be allowed to cool. But he must do it himself and gradually. "Help" with the help of antifreeze cannot. The overheating sensor is activated when the temperature reaches +85 degrees, but as soon as it reaches +95, the unit is blocked. After the boiler has completely cooled, you can try to restart it using the "Turn on/Turn off" button. If the appearance of an error 16 was provoked by a failure in the mains or the sensor itself gave a false signal – the problem will be eliminated.
2. Check the pressure. In the heating circuit, there should be 1.5 bar in normal. If for any reason it is lower-bring to this indicator yourself.
3. Check signal circuits. Error 16 in the Navien boiler may become a consequence of the closure of wires, their cliff, burning off. During diagnosis, you also need to pay attention to the state of contacts.

If all three of these approaches have been attempted without success and error 16 is still visible on the display, there may be an issue with the heating circuit or the boiler itself.

Remote control for Navien boiler

Air in the heating system

If there is air in the heating system, error 16 will show up. This refers, in this instance, to the movement of the bubbles along the contour in conjunction with the coolant, rather than the existence of a single, large air cork. Consequently, the pump’s performance is impacted by the decreased flow rate.

How to fix

Stealing the air is the only way out. However, this needs to be done everywhere the matching reinforcement is placed, not just in one particular location along the contour. Since the springs are deteriorating or the valves frequently clog, there’s no need to hope for automatic valve response. Effective air theft can be achieved solely by hand by monitoring the radiator temperatures in every room.

Take out the air from the pump as well as the system. The idea is a little different in this case:

1. Find a small puck on the end part of the pump.
2. Put a deep container under it.
3. Unscrew the puck of a maximum of 1.5 turnover.
4. A thin stream of water will appear.
5. Drain until only the liquid flows, without bubbles.

If your Navien boiler is flashing error code 16, don"t panic! This common issue can stem from a few culprits, but understanding them can help you fix it swiftly. One potential cause is a problem with the ignition, often due to a lack of gas supply or issues with the igniter itself. Another culprit could be a blockage in the flue or air intake, hindering proper ventilation and causing the boiler to shut down for safety reasons. Additionally, low water pressure or a faulty pressure sensor might trigger error 16. Before calling a professional, try resetting the boiler and checking for any visible obstructions. If the problem persists, it"s best to contact a qualified technician to diagnose and resolve the issue promptly, ensuring your home stays warm and comfortable.

Filted filters

Both the Navien device and the heating circuit have two installed filters. A trunk is one of them, and the boiler entrance is the location of the second. The latter is required to prevent tiny particles, such as dust, salt, rust, and others, from entering the heat exchanger. Sometimes cleaning the filters is sufficient to fix error 16.

The malfunction of the boiler pump

Sometimes, when there are issues with the pump, Error 16 appears. Even though the pump appears to be in good working order and is not broken, its operation does not align with the user’s selected mode. In this instance, it’s important to make sure:

1. Pressure in the heating circuit. If its frequent and sharp jumps are observed, these are the first signs of pomp problems.
2. Nutrition. It can be submitted from the board, but do not reach the engine due to a defect in the compounds. Eliminate such a breakdown is 10-15 minutes.
3. The activity of the impeller. To check it, the boiler is disconnected first. Then remove the puck that closes the hole to remove the air from the pump. In the center you can notice the top of the engine shaft. It is visible on it horizontal slot. The functioning of the pump is checked using a simple screwdriver. It is inserted into a horizontal slot and try to crank. If you do it easy – everything is in order with the pump, if it is difficult – it works incorrectly. Reasons – deposits on the blades, destruction of the bearing, lack of lubrication (heat -resistant composition).

There are instances where replacing the shaft, cleaning the system, and taking air out of the contour will make things right. It is best to speak with the master if none of this helps.

Round pump boiler Navien

Bimetallic thermostat (sensor)

Though it is rare, this part could malfunction. Consequently, an error 16 shows up on the screen.

How to address an issue:

1. Turn off the boiler, wait until it cools down.
2. The wires that go to the bimetallic thermostat are carefully disconnected.
3. Measure the resistance. If the indicators – R> 0.3 Ohms or the wires are completely torn – the sensor requires replacement. The cost of the new – about 350 rubles.

Three -way crane

Error 16 could happen if a three-way crane’s operation is violated. The boiler is unable to alternate between the hot water and modes in the event of a breakdown. A brand-new crane costs between 3,000 and 5,000 rubles. But, you can attempt to remedy the circumstance on your own.

• system pollution;
• Blood microswall;
• the engine is broken (low resistance, cliff, short circuit);
• The destruction of the gear of the gearbox.

It won’t be sufficient to clean the system in order to remove error 16 unless there is systemic contamination. If not, you’ll need to purchase fresh information.

Don’t panic if your Navien boiler is displaying error 16. It’s a frequent problem that is typically fixable with some troubleshooting. The water pressure is among the first things to examine. Make sure the pressure gauge on your boiler is reading correctly because low pressure can cause error 16.

An obstruction in the air intake or flue could also be the source of error 16. An incorrect airflow caused by debris or obstructions can result in an error code. Look for any indications of obstruction in the air intake and flue pipes, and clean them if required. This easy step could be the key to solving the issue.

It’s crucial to inspect the ignition system as well. Error 16 may occur if the boiler is having problems starting. Verify that there is no buildup or damage on the ignition components and that they are clean. Make sure there are no problems with the gas valve and that there is sufficient gas supply.

Should you have attempted these troubleshooting steps and error 16 still occurs, it might be necessary to contact a qualified technician. They possess the knowledge and resources necessary to safely and accurately diagnose the issue. Attempting to resolve complicated problems on your own may result in more harm or even put your safety in danger.

The key to avoiding error 16 and other boiler malfunctions is routine maintenance. Make time for a qualified technician to inspect your boiler annually to ensure optimal operation. By taking care of any problems as soon as they arise, you can keep your house warm and cozy all year long and save money on future, expensive repairs.

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