Navien Water Heater Error Code 008: How to Fix It

Medium 30-60 minutes Medium Severity Verified June 2026
Summarize with ChatGPTSummarize with ClaudeSummarize with Perplexity Add as Preferred Source on Google
Error Code
008
Brand
Navien
Product Type
water_heater
Severity
Medium
DIY Difficulty
Medium
Estimated Fix Time
30-60 minutes
Navien error code 008 indicates that the water heater has detected a loss of flame during operation. This is a safety shutdown caused by the flame rod not sensing a stable flame. Common reasons include gas supply issues, a dirty flame rod, or venting problems. Follow these steps to restore normal operation.
Ad

Tools You'll Need

How to Fix Error Code 008

  1. Reset the Water Heater

    Always turn off power before accessing internal components.

  2. Check Gas Supply

    If you smell gas, do not operate any switches. Evacuate and call your gas company immediately.

  3. Inspect the Flame Rod

    Ensure unit is cool before touching any components.

  4. Check Venting for Blockages

    Never operate the heater with blocked vents. It can cause carbon monoxide buildup.

  5. Test Gas Pressure

    This step requires knowledge of gas systems. If unsure, call a professional.

  6. Inspect the Igniter and Burner Assembly

    Allow unit to cool completely before inspection.

Parts You May Need

Flame rod
Check Price on Amazon
Gas valve
Check Price on Amazon
Flame rod
Check Price on Amazon
Gas valve
Check Price on Amazon
Flame rod
Check Price on Amazon
Gas valve
Check Price on Amazon
Flame rod
Check Price on Amazon
Gas valve
Check Price on Amazon
Ad

When to Call a Professional

If the error persists after cleaning the flame rod and checking vents, or if you suspect a gas supply issue, call a certified HVAC technician. Do not attempt to adjust gas valves or internal gas components yourself.

Frequently Asked Questions

What does Navien error code 008 mean?
It means the water heater lost flame during operation, causing the unit to shut down for safety. This often indicates a dirty flame rod, gas supply issue, or vent blockage.
How do I reset my Navien water heater after error 008?
Turn off the power switch, wait 30 seconds, and turn it back on. The error may clear. If not, you need to troubleshoot the cause.
Can a dirty flame rod cause error 008?
Yes, a dirty or sooty flame rod can fail to detect the flame, triggering error 008. Cleaning the rod often resolves the issue.
Is it safe to use my Navien water heater with error 008?
No, the unit has shut off to prevent unsafe operation. Do not attempt to bypass or reset repeatedly without fixing the underlying issue.
Do I need to call a professional for error 008?
If basic troubleshooting fails, it's best to call a professional to check gas pressure, venting integrity, and internal components.

Related Error Codes