Error code 515-09 navien

Error code 515-09 Navien is a common issue that users may encounter with their Navien heating systems. This error code typically indicates a problem with the water flow sensor or the circulation pump. To resolve this issue, it is recommended to check for any obstructions in the water inlet or outlet, ensure proper water pressure, and inspect the sensor for any faults. If the problem persists, contacting a certified technician for further assistance is advisable.


Error code 515-09 navien – What could be causing this error?

When encountering Error code 515-09 in a Navien heating system, there are several potential causes that could be contributing to the issue. These may include:

  • Improper venting: Issues with the venting system can lead to error codes like 515-09. Adequate venting is crucial for the proper operation of the system.
  • Gas supply problems: If there are interruptions or irregularities in the gas supply to the unit, it can trigger error codes. Ensuring a consistent gas supply is essential.
  • Ignition problems: Issues with the ignition process can also result in error code 515-09. Faulty ignition components or incorrect settings may be at fault.
  • Combustion issues: Problems with combustion, such as a clogged burner or insufficient air supply, can cause the system to generate error codes like 515-09.

Checking and addressing these potential causes can help in diagnosing and resolving the Error code 515-09 in a Navien system effectively.

Error code 515-09 navien – How to Fix?

To resolve Error code 515-09 Navien, follow these steps:

  1. Check the Gas Supply: Ensure that the gas supply to the unit is turned on and that there are no issues with the gas connection.
  2. Inspect the Ignition: Verify that the ignition system is functioning properly. Clean the ignition components if necessary.
  3. Reset the Unit: Power cycle the Navien unit by turning it off, waiting for a few minutes, and then turning it back on.
  4. Review Venting: Make sure the venting system is clear of obstructions and that it is properly installed according to manufacturer specifications.
  5. Check for Error Codes: Besides 515-09, look for any additional error codes that may provide further insight into the issue.

If after following these steps the error persists, contact a certified technician for professional assistance to diagnose and repair the Navien unit.


Error code 515-09 Navien: This error indicates a communication problem between the main PCB and the front control panel in Navien water heating systems. To resolve this, check the wiring connections and restart the unit. If the problem persists, contact a professional technician for further assistance.

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