Navien Error Code E110: A Guide for Homeowners

If you’re a homeowner relying on a Navien tankless water heater or boiler system, encountering error codes can be a frustrating experience. One of the most common issues is Navien error code E110, which can leave you without hot water and scratching your head. Don’t worry though! This blog post will break down what this error means, why it happens, and how to resolve it. Whether you’re a DIY enthusiast or prefer calling in a professional, you’ll find practical advice to help you get your plumbing systems back on track.

What is Navien Error Code E110?

Navien error code E110 typically appears when there’s an issue with the flow of water in your system. The code is linked to a low water flow or water pressure problem. Your Navien unit needs a specific flow rate to operate correctly, and if that flow is disrupted or insufficient, the system will trigger the E110 code.

This issue can arise for several reasons, such as a clogged filter, a malfunctioning pump, or even issues with the water supply itself. The key is figuring out which part of your plumbing system is affecting the water flow to your Navien unit.

Why Does Navien Error Code E110 Happen?

There are a few common causes behind the Navien error code E110 that you should be aware of. Here’s what could be going wrong:

1. Clogged Filter: Over time, filters in your Navien system can become clogged with debris, limiting the amount of water that flows through. This can trigger the E110 error.
2. Low Water Pressure: If your home’s water pressure drops below the minimum level required for the Navien system to operate, the error code can pop up.
3. Pump Malfunction: The circulation pump that drives water through the system might be faulty or failing, leading to insufficient water flow.
4. Plumbing System Issues: Sometimes, the issue may not be directly with the Navien unit, but rather with the broader plumbing systems in your home. Issues like partially closed valves or sediment buildup can affect water flow to your heater.

Understanding the cause is the first step toward fixing the issue, so it’s helpful to check your system thoroughly.

How to Make the Most of Navien Error Code E110

Image Credit – Reddit

If you’ve encountered the Navien error code E110, don’t panic. Here’s how to troubleshoot and resolve the issue:

Step 1: Check the Water Pressure

First, ensure that the water pressure in your home is adequate. You can do this by checking the pressure gauge on your water heater. For most Navien units, the pressure should be between 30-80 PSI. If it’s too low, try adjusting the pressure regulator on your plumbing systems.

Step 2: Inspect the Filter

Navien systems come with filters that need to be cleaned or replaced periodically. If you notice a buildup of debris or sediment, this could be restricting water flow. Turn off your Navien unit and locate the filter—typically found near the inlet valve. Clean it gently or replace it if needed.

Step 3: Check the Circulation Pump

The circulation pump is responsible for pushing water through your Navien system. If the pump is malfunctioning or clogged, it could prevent adequate water flow. You may need a professional to inspect and repair the pump if you can’t identify the problem yourself.

Step 4: Inspect Plumbing Systems for Obstructions

Sometimes the problem lies in your home’s plumbing systems rather than the Navien unit itself. Check for partially closed valves, airlocks, or pipe blockages that may be affecting water flow. Flushing the system can help clear out any blockages and restore proper flow.

How Do I Fix Navien Error Code E110?

Step 1: Identify the Issue

• Error Code E110 and the wrench or service symbol indicate an air pressure issue. This could be due to ice, snow, or debris blocking the exhaust or intake.

Step 2: Check the Exhaust and Intake Outside

1. Locate the Exhaust and Intake Pipes.

2. Inspect the exhaust pipe and intake pipe for any visible obstructions like ice, snow, or debris.

Tip: Look out for ice cubes or snow accumulation that could block proper ventilation.

Step 3: Check for Obstructions

1. Look closely for any ice or snow around the exhaust or intake.

2. Make sure there are no large snow piles blocking the vents.

Tip: Even a small ice build-up or snow can affect the exhaust flow and cause the error.

Step 4: Power Down the Unit

1. Turn off the Navien system by pressing the power button.

2. Unplug the system to ensure safety before you proceed.

Step 5: Remove the Cover

1. Flick open the tabs on the sides of the unit to remove the cover.

Step 6: Locate the Air Intake Filter

1. Find the air intake filter in the upper left-hand corner of the unit.

2. The filter is secured with a small screw. Remove the screw carefully to avoid losing it inside the unit.

Step 7: Clean the Filter

1. Take the filter to a bathroom or sink.

2. Use soap and water to clean off dirt, grass, or debris.

3. Dry the filter completely with a towel.

Step 8: Reinstall the Filter

1. Once the filter is clean and dry, slide it back into the unit.

2. Secure the filter with the screw.

Step 9: Replace the Cover and Power the Unit Back On

1. Put the cover back on the unit.

2. Plug the system back in and turn it on.

Step 10: Test the System

1. Turn on a faucet to check if the system starts heating up water.

2. Ensure there is no error code, and the system operates as expected.

What Are the Risks of Ignoring Navien Error Code E110?

While it may seem tempting to ignore Navien error code E110, doing so can lead to more serious issues down the road. Continued water flow problems can strain the system, potentially causing further damage to the pump or other components. If left unresolved, this could even lead to complete system failure, leaving you without hot water or heating.

FAQ: Your Navien Error Code E110 Questions Answered

1. Can I fix Navien error code E110 myself?

Absolutely! If you’re comfortable with DIY repairs, start by checking the water pressure, cleaning the filter, and inspecting the circulation pump. For minor issues, you can resolve the error on your own. However, if the problem persists or if you’re unsure about the repairs, calling a professional plumber is a good option.

2. How often should I clean my Navien filter?

It depends on your water quality and usage, but typically, cleaning or replacing your Navien filter every 6 months to a year is recommended. If you have hard water or a high amount of sediment, you may need to clean it more frequently.

3. Will low water pressure cause permanent damage to my Navien system?

Low water pressure won’t immediately cause permanent damage, but it can strain the system over time, leading to inefficiency or more serious issues. It’s always best to address low water pressure as soon as possible to keep your Navien system running smoothly.

4. Is Navien error code E110 a common issue?

Yes, error code E110 is relatively common, especially in systems that have been in use for several years. Regular maintenance and monitoring of your plumbing systems can help prevent this error from popping up.

Wrapping It Up: Keep Your Navien System Running Smoothly

In conclusion, Navien error code E110 is a sign that your system is experiencing low water flow. By checking water pressure, cleaning filters, inspecting the pump, and maintaining your plumbing systems, you can easily troubleshoot and resolve this issue.

Remember, proper maintenance is key to extending the life of your Navien system and ensuring it runs smoothly. And if you ever feel out of your depth, don’t hesitate to reach out to a professional plumber. They’ll have the expertise to address more complex issues and ensure your system is functioning at its best.

Good luck, and keep your water flowing!

Disclaimer: Some images used in this post are screenshots from the Acreage Life YouTube Channel and are included solely for informational purposes. Full credit and rights belong to their respective owners.