Navien Error Codes — Complete Guide for Tankless Water Heater & Boiler Systems
Navien systems are known for efficiency and reliability, but like any advanced appliance, they display error codes when something isn’t working correctly. This page helps you understand what those codes mean, the most common causes, and when it’s time to call a professional. Choose your appliance type below to view all available Navien error codes.
Navien Water Heater Error Codes
Navien tankless water heaters use error codes to indicate issues with ignition, water flow, sensors, venting, and internal components. Select a code below to view detailed explanations and troubleshooting steps.
More Navien Water Heater Codes Coming Soon
Navien Boiler Error Codes
Navien boilers use a different set of codes that often relate to circulation, pressure, sensors, and communication faults. Browse the codes below for detailed breakdowns.
More Navien Boiler Error Codes Coming Soon
What Navien Error Codes Usually Mean
While each code is specific, most Navien issues fall into a few common categories:
- Ignition or flame detection failures
- Blocked or restricted venting
- Water flow or pressure problems
- Temperature sensor faults
- Heat exchanger or circulation issues
- Communication or electrical errors
- Overheating or safety lockouts
Each individual error code page explains the exact meaning, causes, and recommended steps.
When You Can Troubleshoot vs. When to Call a Technician
Some Navien error codes can be resolved with simple checks like:
- Resetting the unit
- Cleaning or replacing filters
- Restoring water flow
- Checking venting for blockages
- Ensuring gas or power supply is stable
However, repeated lockouts, ignition failures, overheating warnings, or internal sensor faults should be handled by a certified technician. Navien systems are complex, and incorrect repairs can lead to further damage or safety risks.
Professional Navien Service in Vancouver & the Lower Mainland
If your Navien tankless water heater or boiler continues to show an error code, our certified technicians can diagnose and repair the issue safely. We work with all Navien models and provide expert service for:
- Navien tankless water heaters
- Navien combi‑boilers
- Navien heating boilers
Whether your system won’t reset, keeps shutting down, or displays recurring error codes, we can help restore reliable operation.