Navien Water Heater Error Code 016: How to Fix It
Medium 30-45 minutes Medium Severity
Verified June 2026
- Error Code
- 016
- Brand
- Navien
- Product Type
- water_heater
- Severity
- Medium
- DIY Difficulty
- Medium
- Estimated Fix Time
- 30-45 minutes
Ad
Tools You'll Need
- Screwdriver
- Soft brush or vacuum
How to Fix Error Code 016
-
Turn Off Power and Gas
Always turn off power and gas before servicing to prevent burns, electric shock, or gas leaks. -
Check Gas Supply
If you smell gas, do not proceed. Leave the area and call your gas company immediately. -
Inspect Venting System
-
Clean Air Intake Filter
-
Reset the Unit
Parts You May Need
Air intake filter
Check Price on Amazon
Air intake filter
Check Price on Amazon
Air intake filter
Check Price on Amazon
Air intake filter
Check Price on Amazon
Ad
When to Call a Professional
If error 016 persists after checking gas supply and venting, contact a Navien-certified technician. There may be issues with the gas valve, burner assembly, or control board that require specialized service.Frequently Asked Questions
What does Navien error code 016 mean?
Error 016 means flame loss during high fire operation, indicating the burner flame extinguished while running at full capacity.
Can I reset Navien error 016 myself?
Yes, try resetting by turning off power for a few minutes and then turning it back on. But if the error recurs, the underlying issue must be fixed.
How do I clean the air intake on a Navien water heater?
Locate the air filter (usually on top or side), remove it, wash with soap and water, dry thoroughly, and reinstall.
What causes flame loss on a Navien tankless water heater?
Common causes include blocked vents, dirty air filter, low gas pressure, or a faulty gas valve.
Is Navien error 016 dangerous?
It can be if caused by a gas leak or carbon monoxide issue. If you smell gas or suspect a leak, evacuate and call a professional.