How to Reset Your Navien Water Heater in 3 Simple Steps
On this page 5 sections
To reset your Navien water heater, locate the reset button on the control panel, press it for a few seconds, and ensure the unit is powered on afterward.
Resetting your Navien tankless water heater can solve common error codes and restore hot water quickly. Whether you’re dealing with ignition failures, flow issues, or system errors, this guide covers all reset methods for Navien models with clear troubleshooting tips.
When Should You Reset Your Navien Water Heater?
Reset your Navien unit when you see:
- Error codes flashing on the display
- No hot water despite power being on
- Frequent system shutdowns
- After power surges or outages
- Following maintenance or repairs
Common Navien Error Codes Requiring Reset
| Error Code | Meaning |
|---|---|
| E003 | Ignition failure |
| E012 | Water flow issues |
| E110 | Overheating |
| E160 | Gas supply problem |
Step-by-Step Reset Instructions
Method 1: Using the Reset Button
- Locate the control panel on your Navien unit
- Find the reset button (marked “RESET” or with a return arrow symbol)
- Press and hold for 5 seconds
- Wait for the system to reboot (about 30 seconds)
Method 2: Power Cycle Reset
- Turn off power at the circuit breaker
- Wait 60 seconds for complete power discharge
- Restore power at the breaker
- Press the power button on the unit
For Gas Models:
After resetting gas models, you may need to relight the pilot light following manufacturer instructions.
Troubleshooting After Reset
If problems persist after reset:
- Check gas supply valves are fully open
- Verify water pressure is between 15-150 psi
- Inspect venting for blockages
- Ensure minimum flow rate of 0.6 GPM
For complex issues, consult a licensed plumber familiar with Navien systems.
Water Heater Owner's ToolkitFix the common faults yourself, keep it running for years, and know when a repair is money wasted.No-hot-water flowcharts, gas and electricFlush, anode, relief valve and descaling stepsRepair-or-replace calculator (Excel)Preventive Maintenance Tips
Reduce the need for resets by:
- Annual professional descaling
- Monthly filter cleaning
- Quarterly visual inspections
- Installing a check valve if needed
According to Navien’s official documentation, proper maintenance can extend your unit’s lifespan by 5-7 years.
When to Call a Professional
Contact a Navien-certified technician if you experience:
- Repeated error codes after reset
- Gas odor or water leaks
- Unusual noises during operation
- Consistent temperature fluctuations
As noted by HVAC professionals, attempting complex repairs yourself may void your warranty.
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