GeneralWindows Errors

How to Quickly Fix 5 Common Navien Error Codes: An Expert’s Guide

How to Quickly Fix 5 Common Navien Error Codes: An Expert's Guide

Understanding Navien Error Codes

While using Navien tankless water heaters, you might encounter various error codes on the digital screen, which indicate specific issues with the system. These Navien error codes help guide you in diagnosing problems and applying the necessary fix. Technically, these codes range from 001 to 999, each representing a different kind of malfunction. Some involve minor issues that you can resolve yourself, while others might be more complex, requiring professional help. This guide will focus on five common codes: 003, 027, 038, 048, and 110. Understanding the meanings of these codes is crucial in troubleshooting the issues effectively and quickly.

Troubleshooting Navien Error Code 003

The Navien Error Code 003 pertains to the ignition failure of your heater. The common causes for this could be gas supply problems, faulty ignition parts, or a blocked vent pipe. Initially, check if the gas valve is turned on and if the gas pressure is adequate. If the problem persists, inspect the ignitor for any signs of damage or wear. If the ignitor seems fine, then check the vent pipe for any obstructions. In case the issue remains unresolved after these checks, it might be time to call in a professional to avoid causing further damage.

Quick Fix for Navien Error Code 027

The Navien Error Code 027 is related to a water adjustment valve failure. This error can occur due to a faulty valve or a wiring problem. The first step to solve this issue is to check the wiring for any visible damage. If the wires are intact, the next step would be to examine the operation of the water adjustment valve. If the valve is not working correctly, replacing it could solve the issue. Remember, it might be advisable to involve a professional if replacing the valve is beyond your comfort level.

How to Solve Navien Error Code 038

When your tankless water heater displays the Navien Error Code 038, it means there’s an issue with the exhaust temperature. This issue could be due to a problem with the exhaust sensor, venting problem, or blockage in the heat exchanger. Start by checking the venting system for blockages. If it’s clear, check the exhaust sensor’s wiring for any signs of damage. If all seems well, examining the heat exchanger for any blockages would be the next step. If none of these solutions work, it might be time to contact a professional.

Addressing Navien Error Code 048 – An Expert’s Insight

Navien Error Code 048 is an indication of a problem with the mixing valve circuit. This could be due to a malfunctioning valve, a wiring problem, or a faulty control board. Begin by inspecting the wiring of the valve for any visible damage. If everything seems fine, check the operation of the mixing valve. Should the problem still persist, the issue could be with the control board. In this case, it would be best to involve an expert, as dealing with a faulty control board can be complex.

Dealing with Navien Error Code 110 – Tips and Tricks

Finally, the Navien Error Code 110 implies an issue with the air pressure sensor. This error could occur due to a blocked air intake or exhaust vent, water in the vent pipe, or a faulty sensor. Initially, check the air intake and exhaust vent for any blockages and remove them if any. Next, ensure there’s no water in the vent pipe. If the error persists, the sensor might be at fault and needs replacement. It’s recommended to seek professional help when dealing with sensor issues.

Final Thoughts

Troubleshooting Navien Error Codes can seem daunting, especially for non-experts. However, with a basic understanding of what these codes mean, you can diagnose and possibly fix minor issues yourself. For complex issues, it’s always advisable to call in a professional to avoid causing further damage. Remember, regular maintenance of your Navien tankless water heater can prevent many of these issues from arising in the first place.


Q1: What should I do if my Navien heater shows an error code not covered in this guide?

A1: Navien has a comprehensive error code list in their product manual. If you encounter codes not covered here, refer to this manual. If the issue persists, it’s best to contact a professional.

Q2: How often should I service my Navien tankless water heater?

A2: As a rule of thumb, you should schedule regular maintenance for your heater at least once a year.

Q3: Where can I find professional help for Navien heater issues?

A3: You can reach out to Navien’s customer service or contact a local professional who specializes in Navien products.

This content is submitted by the contributor and we( have no control over this content and it can be not legit factual, you can modify it according to your way.

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