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Navien Tankless Water Heater error code E110- How to fix

Waking up to no hot water can be a distressing event, particularly when it’s in the dead of winter, and your shower fixture is spewing icy water. While traditional water heaters have their own sets of problems, this article will focus on a particular concern that affects users of tankless water heating systems, particularly Navien tankless water heaters. This irritation is captured in the Navien error code E110: a source of frustration for many homeowners despite the overall reliability of this high-quality water heating line. This article will explore the common causes of this error and steps on how to fix it.

Understanding the Navien Tankless Water Heater Error Code E110

Navien tankless water heaters are equipped with a self-diagnostic system that displays error codes when a problem occurs. An E110 error code generally indicates that there is a defective or broken ignition transformer, a faulty fan motor, or a critical power supply issue. Often, these problems can provoke the device to shut down to prevent more extensive damage.

The error E110 may seem daunting at first. However, if you’re comfortable with basic troubleshooting and have patience, there are steps you can take to try and fix it yourself.

How to Detect the Source of the Error Code E110

Run a detailed check on the equipment: Ensure that the installation was done correctly and the components are clean and free of debris. Start by checking the voltage supply. For Navien tankless water heaters, the voltage should be between 110 and 120 volts. Anything less and you have to consider that power supply issues could be the source of the E110 error.

Analyze the ignition transformer: This involves assessing whether the ignition transformer needs a replacement. This component is crucial as it provides the spark required to light the burner. If the ignition fails, even though there is gas supply and the power is on, it may indicate a broken transformer.

Inspect the fan motor: A faulty fan motor can also trigger an E110 error. The fan’s function is to provide the necessary air required for combustion. Therefore, debris or a malfunction can impair combustion efficiency, causing the heater to shut down.

Steps to Fix Navien Tankless Water Heater Error Code E110

Should you confirm through your inspection that any of these components are causing the E110 error, fixing the issue could involve the following steps:

Rectifying Power Issues: If the voltage supply is less than required, it’s advisable to call in a professional electrician. They can evaluate your home’s electrical system and suggest necessary corrections.

Replacing the Ignition Transformer or Fan Motor: For replacement parts, it is crucial that you go directly to a Navien dealer. While other parts may be cheaper, they may not align with the specifications of your model, leading to further damage.

The processes of replacing an ignition transformer or a fan motor can be a bit complex and may demand the services of a trained technician. However, for those who are mechanically inclined, Navien provides comprehensive guides to help users perform these tasks.

As you tackle such a project, always remember to prioritize safety, turn off the power, and make sure to document your steps. This could aid in reassembly or providing a detailed account to your service provider should you need professional intervention.

Navien tankless water heaters are intelligent and adaptive solutions for warm water needs, but like all technology, they might present occasional challenge. Error E110 is one of them, but with the right understanding, equipment, and where necessary, professional help, your hot water issues can be resolved conveniently.

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