Navien Error Codes:

Without proper maintenace your boiler can act up. It's best to schedule, an on-going, annual maintenace for your Navien boiler. If your Navien boiler is displaying these error codes, you must contact a certified boiler Technician to fix the issue. Error codes such as:

• Ignition Failure (Error Code E003, sometimes E001): It means the boiler is failing to light.
• Low Water Pressure (Error Code E302, sometimes E002): The system pressure has dropped below the required level for operation.
• Heat Exchanger Issues (Error Codes E016, E046, sometimes E001, E002, E055): Problems related to the heat exchanger, often involving overheating.
• Flame Loss (Error Code E012, sometimes E004 - False Flame): The boiler ignites but the flame goes out unexpectedly.
• Venting, Fan, and Air Pressure Problems (Error Codes E110, E109, E127, E060): Issues related to air intake, exhaust, or the fan motor.
• Sensor and Control Board Failures (Various Codes like E205, E218, E407, E421, E353, E515, E517, E594, E615): Malfunctions of various sensors (temperature thermistors, water pressure, flow sensor, exhaust sensor) or the main Printed Circuit Board (PCB).
• Flow Sensor Issues (Sometimes no code, or E439): The flow sensor detects water movement to trigger heating. If it's not working correctly, the unit may not produce hot water even without an error code.