Navien Water Heater Error Code 080: How to Fix It

Medium 15-30 minutes Medium Severity Verified June 2026
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Error Code
080
Brand
Navien
Product Type
water_heater
Severity
Medium
DIY Difficulty
Medium
Estimated Fix Time
15-30 minutes
Error code 080 on a Navien tankless water heater indicates a dip switch setting fault. This usually means the internal DIP switches on the main PCB are not configured correctly for your specific water heater model. This guide will help you resolve the issue safely.
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Tools You'll Need

How to Fix Error Code 080

  1. Turn Off Power and Gas

    Always turn off power and gas before servicing to avoid electric shock or gas leaks.

  2. Access the Main PCB

  3. Identify the DIP Switch Bank

  4. Check Current DIP Switch Settings

  5. Adjust DIP Switches to Factory Default

    Be careful not to damage the switches. Use gentle pressure.

  6. Reassemble and Restore Power

Parts You May Need

Main PCB (control board)
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Main PCB (control board)
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Main PCB (control board)
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Main PCB (control board)
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When to Call a Professional

If error code 080 returns after adjusting DIP switches to factory defaults, the main PCB may be faulty and require replacement by a qualified technician.

Frequently Asked Questions

What does Navien error code 080 mean?
It means the dip switch settings on the main PCB are incorrect. This prevents the water heater from operating properly.
How do I reset Navien error code 080?
After adjusting DIP switches to the correct settings, cycle power to the unit (turn off and on). The error should clear.
Can I fix Navien error 080 myself?
Yes, if you are comfortable opening the unit and adjusting small switches. If not, call a professional.
What causes Navien error code 080?
Incorrect dip switch configuration, often due to a factory setting error or after replacing the main PCB.
Do I need to replace any parts for error 080?
Usually no. If the error persists after proper DIP switch adjustment, the main PCB may need replacement.

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