The Navien water heater, including tankless models used in many American homes, sometimes needs a reset to clear error codes, restore normal operation, or address intermittent shutdowns. This guide provides clear, safe steps to perform a reset, along with troubleshooting tips and common error codes. It covers popular models and outlines both power-cycle resets and button-based resets where applicable, helping users minimize downtime and avoid unnecessary service calls.
What A Reset Does For A Navien Water Heater
A reset reinitializes the control board, clears transient fault codes, and allows the unit to restart its startup sequence. In many cases, a reset resolves minor electrical glitches or sensor quirks without affecting safe operation. However, resets do not fix underlying mechanical issues or gas/venting problems. If codes persist after a reset, or if there are signs of gas odor, improper venting, or water leakage, professional service is recommended.
When A Reset Is Needed
Common scenarios for performing a reset include nuisance fault codes, rapidly cycling displays, or the unit shutting down due to a temporary fault. If the display shows persistent codes such as diagnostic errors, low flame, or high water temperature warnings, a reset can help determine if the issue is transient. Do not reset the unit if there is a gas smell, unusual noise, or evidence of improper venting. In such cases, shut off the gas and call a licensed technician immediately.
Resetting Navien Tankless Heaters
Navien offers two primary reset approaches: a simple power-cycle reset and a control panel reset. The exact steps can vary by model, but the following methods cover most US-market Navien tankless units. Always refer to the user manual for model-specific instructions.
Power-Cycle Reset (General Method)
- Turn off the power to the unit at the dedicated switch or the circuit breaker.
- Wait at least 60 seconds to allow all capacitors to discharge.
- Restore power and allow the unit to go through its startup sequence.
- Check the display for a normal operating status and absence of error codes.
Control Panel Reset (Model-Specific)
- Access the Navien control panel. Depending on model, press and hold the reset button or combination of buttons (for example, up and down arrows together) for 3–5 seconds.
- Release when the screen confirms a reset or returns to a ready state.
- If the unit returns a fault code, note the code and consult the error code table or manual for diagnostic steps.
Reset While Diagnosing Error Codes
- Record any fault codes before resetting.
- After reset, observe whether codes reappear. If they do, there may be an intermittent fault or a sensor/flow issue requiring inspection.
- For persistent codes, consider checking water flow, gas supply, purifier filters, and venting integrity before requesting service.
Safety Considerations And Preparations
- Before any reset, ensure proper ventilation and verify there is no gas leak or odor.
- Shut off power and/or gas if there is any sign of unsafe conditions.
- A reset is not a substitute for required maintenance, such as descaling, filter cleaning, or vent inspection.
- Consult a licensed professional if a fault code reappears after a reset or if the unit does not restart normally.
Common Navien Error Codes And Reset Outcomes
Understanding typical codes helps decide when a reset is appropriate and what to do next. The table below provides common examples and recommended actions. If a code not listed appears, consult the manual or Navien support for model-specific guidance.
| Code | Meaning | Recommended Action After Reset |
|---|---|---|
| E060 | Flame failure or ignition issue | Power cycle, check gas supply, and ensure proper venting. If persists, service is needed. |
| E002 | Water flow issue or sensor fault | Inspect water connections and flow rate. If unchanged after reset, sensor or valve inspection is advised. |
| E010 | Overheat condition | Do not repeatedly reset. Shut down, inspect for blockages or hot outlet, and verify thermostat settings. |
| E019 | Low water temperature warning | Check water heater temperature setting and incoming water temperature. A reset may clear transient fault. |
| Other | Various diagnostic alerts | Reset if advised by the manual; otherwise, seek professional diagnostic. |
Maintenance Tips To Minimize Unplanned Resets
- Schedule regular descaling if hard water is common in the area to prevent mineral buildup that can trigger faults.
- Clean or replace filters per manufacturer recommendations to maintain water flow and heat exchange efficiency.
- Inspect venting and exhaust paths for blockages or leaks, especially after renovations or weather events.
- Ensure the gas supply and pressure are stable and within the unit’s specified range.
- Keep the local electrical supply stable; use a dedicated circuit if possible to avoid electrical noise and outages affecting operation.
When To Call For Professional Service
If reset procedures fail to restore normal operation, or if fault codes persist after a reset, professional service is advised. Contact a licensed plumber or HVAC technician who has experience with Navien systems. Provide model information, serial number, and a list of observed symptoms to expedite diagnosis.
Documentation And Resources
- Navien user manuals and model-specific guides
- Navien customer support and official website
- Local licensed technicians specializing in Navien systems
