You can only pay for the consumed resources and control the heating power with an autonomous heating system. Many residents of houses and apartments install boilers of the Korean manufacturer Navien. Despite the quality and duration of operation, even this equipment is prone to breakdowns. We will list the errors of the Navien boiler, and reveal their meaning. You will find out in what cases you can repair the device yourself, and when it is better to contact the master.
Hardware Features
The technique is wall and floor type. The most popular models are Navien Ice, Navien NCN SteelGA / GST, Navien AceTurbo and Ace Atmo, Navien LST. Among all the variety you will find boilers with atmospheric and turbocharged combustion chambers. There are also condensing ones with an integrated heat exchanger for condensate collection. Read more in the article “What is a gas condensing boiler”.
By the type of work, the units are divided into double-circuit and single-circuit. Double-circuit are equipped with two heat exchangers for heating water and heating the room. All models have a Russified remote control, as well as sensors for monitoring systems.
The control circuit is equipped with a microchip, so the equipment is not afraid of power surges. The design ensures stable operation when the pressure is reduced to 0.1 bar.
The built-in circulation pump will not allow the coolant to freeze even in the event of a gas shutdown.
The self-diagnosis system of the boiler allows you to detect breakdowns at an early stage, as well as to understand why the problem arose, how to fix it. Before you start repairing yourself, make sure that the warranty has expired. If you open the device, it will become invalid.
Error decoding
How to fix the problem? The repair instructions in our table will help.
Error Codes | Value | DIY repair |
01E | Overheating of mounted equipment. |
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02E | There is not enough fluid in the heating circuit, pressure drops. Damaged duct sensor wiring. |
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Error 03 E | No flame reported. The technique does not start. |
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04E | The system reports a flame, although fuel does not enter the burner. | Diagnostics of the flame sensor, its contacts and connections. Connect a working electronic board. |
05E | Malfunctions in the circuit of the heating temperature sensor and electronic module. | Inspection of wiring, circuit repair, tightening of contacts. |
06E | The temperature sensor does not turn on. Short circuit. | |
07E / 08E | Short circuit DHW thermistor. | |
Error 09E | The fan does not work. | Check motor and fan contacts. Replace as necessary. |
Error 10E | Problems with the removal of combustion products. | What to do:
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11E | Faulty coolant filling sensor. The code is typical for European-made models. | The cause may be a power surge. If there was no jump, check the settings of the DIP switches - set the correct ones according to the instructions. If this does not help, contact the service. |
Error 13E | The flow controller in the heating circuit is out of order. | Adjust the detail settings check box, clear it of clogging. Connect a new item. |
12 | Problems with the functioning of gas valves. |
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15 | Equipment malfunction. | Reboot technology. Checking the connectors and wiring of the control board. |
Error 16 | Overheating sensor has tripped. | How to fix the problem:
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17 | Incorrect connection of DIP switches to the display. | Reconnecting |
18 | The smoke removal sensor overheats. |
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27 (for Ice, Ice Coaxial) | Problems with the air pressure sensor. | Inspection of the sensor, its wiring, circuit, contacts. |
Other malfunctions of the Navien boilers
Even if the codes on the display do not appear, and you notice malfunctions, proceed to eliminate them.
Why is the boiler humming and humming?
At the same time, hot water does not flow from the tap, or a thin stream flows. The reason is the clogging of the heat exchanger due to poor-quality water.
Water contains potassium and magnesium salts. When heated above 55 degrees, they are deposited on the nodes and parts, the walls of the radiator. The thicker the scum layer - the narrower the passage for water. Therefore, the pressure decreases, and the liquid boils. As a result, there is no hot water, extraneous sounds are heard. Due to poor heat dissipation, heating is often turned on, resulting in high fuel consumption.
How to be:
- Flush the heat exchanger, clean its tubes. Perform regular maintenance of the unit at least once a year;
- Install a cleaning filter that will “soften” the water;
- Do not set the heat - then the scale will not be deposited.
Heating does not work
If the DHW heating is normal and the heating circuit is not working, check the three-way valve. It switches the heating between the circuits. Perhaps it jammed, or it failed. Replace.
The remote control does not work
Insert new batteries.
Such problems are faced by users of Navien boilers most often. If you follow the operating rules and conduct regular preventive maintenance, you will be able to avoid many problems.