Navien Water Heater Error Code 014: How to Fix It

Medium 30-60 minutes Medium Severity Verified June 2026
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Error Code
014
Brand
Navien
Product Type
water_heater
Severity
Medium
DIY Difficulty
Medium
Estimated Fix Time
30-60 minutes
Error code 014 on your Navien tankless water heater indicates a flame loss in low fire mode. This means the burner's flame is unstable or extinguishes at low firing rates. Common causes include a blocked gas supply, dirty burner, or faulty flame rod. Follow the steps below to diagnose and fix the issue.
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Tools You'll Need

How to Fix Error Code 014

  1. Reset the Unit

  2. Check Gas Supply

    If you smell gas, do not proceed. Evacuate and call your gas company immediately.

  3. Inspect the Gas Pressure

    Gas pressure testing requires a manometer. If you are not comfortable, call a technician.

  4. Clean the Burner Assembly

    Ensure the unit is fully cooled before cleaning. Wear gloves to avoid cuts.

  5. Inspect and Clean the Flame Rod

    Be gentle to avoid damaging the rod.

  6. Check the Exhaust Vent

Parts You May Need

Flame rod
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Burner assembly
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Flame rod
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Burner assembly
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Flame rod
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Burner assembly
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Flame rod
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Burner assembly
Check Price on Amazon
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When to Call a Professional

If error persists after cleaning burner and flame rod, or if gas pressure is low, contact a qualified HVAC technician. Do not attempt to adjust gas valves yourself.

Frequently Asked Questions

Why does my Navien water heater flash error code 014?
Error 014 indicates flame loss in low fire mode, typically caused by a dirty burner, low gas pressure, or a faulty flame rod.
Can I fix Navien error 014 myself?
Yes, you can try resetting, checking gas supply, cleaning the burner and flame rod. If those fail, call a professional.
How do I clean the flame rod on a Navien water heater?
Remove the flame rod from the burner assembly, gently clean it with fine sandpaper or steel wool, then reinstall it securely.
What gas pressure should my Navien water heater have?
Natural gas: 5-7 inches WC. Propane: 8-14 inches WC. Low pressure can trigger error 014.
Will error 014 damage my Navien water heater?
If ignored, repeated flame loss can cause incomplete combustion and potential carbon monoxide issues. Address it promptly.

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