9 Eternal Water Heater Error Codes & Their Meaning
If your eternal water heater is going through any issue, it will flash an error code on the display. As a result, you can easily detect the water heater problem if you know the meaning of the error code. Throughout this guide, we highlighted the common eternal water heater error codes that will appear. We also break down how to clear those error messages. So, keep scrolling.
Table of Contents
- Eternal Water Heater Error Codes: 9 Common Error Codes & Their Meaning
- 01. Eternal Tankless Water Heater Error Code e02
- 02. Eternal Tankless Water Heater Error Code eo3
- 03. Eternal Tankless Water Heater Error Code e4
- 04. Eternal Tankless Water Heater Error Code e11
- 05. Eternal Tankless Water Heater Error Code e23
- 06. Eternal Tankless Water Heater Error Code e24
- 07. Eternal Tankless Water Heater Error Code e26
- 08. Eternal Tankless Water Heater Error Code e27
- 09. Eternal Tankless Water Heater Error Code e28
- FAQs
- End-Notes
Eternal Water Heater Error Codes: 9 Common Error Codes & Their Meaning
This chapter will let you learn about the error codes, their meaning, and the way of clearing them.
01. Eternal Tankless Water Heater Error Code e02
The error code E2 stands for ignition failure or the heater fails to detect the flame signal. Your Eternal heater will flash this error message ‘e02 or e2’ if there is a problem with the gas line, igniter, and flame rod. Therefore, the water heater will pop up this error code if the wire connection of the 8p wire and ignitor wire gets damaged. Improper gas type and manifold pressure also encourage your heater to flash the error code ‘E2’.
How To Clear:
To clear this error code from the digital display, follow the below troubleshooting steps:
1. Inspect the gas line, igniter, and flame rod if the water heater digital monitor displays this error code. Ensure the gas line is free from a clog by dirt, debris, and dust. Plus, grab a stainless steel brush to clean on and around the igniter and flame rod. If the igniter or the flame rod gets defective, replace them to fix this issue.
2. Check the wire connection between the 8p wire and igniter for a crack or visual damage. If the wiring gets faulty, repair the connection.
3. Don’t forget to check out the manual to adjust and correct the gas type and manifold pressure.
02. Eternal Tankless Water Heater Error Code eo3
When your water heater senses abnormal combustion, the digital display will flash out this error message ‘eo3’. Indeed this error code indicates the faulty combustion process of the heater. In other words, the system loses the signal after detecting the flame signal. Here are the reasons that cause this water heater issue.
- Insufficient gas supply
- Defective gas valve
- Lack of voltage
How To Clear:
Follow these troubleshooting steps to clear the error code ‘eo3’:
- Make sure the gas supply is sufficient. If needed, check the gas line for a clog that may cut out the proper gas flow.
- Replace the gas valve with a new one if it gets faulty.
- Inspect the power supply for proper voltage.
03. Eternal Tankless Water Heater Error Code e4
Your Eternal tankless water heater will pop out the error code ‘e4’ if the outlet thermistor is open. Faulty wire connection of 14p wire and thermistor wire is also responsible for flashing this error message.
How To Clear:
Start the troubleshooting workflow by checking the thermistor of the water heater. Close the outlet thermistor if it remains open. Next, check the wiring of the 14p wire and thermistor wire for visual damage. If the wire connection gets cracked, replace the wiring with a new one.
04. Eternal Tankless Water Heater Error Code e11
The water heater will show the error code e11 if the DC motor fails. The DC motor will fail if it gets damaged due to its prolonged use. Therefore, a faulty 6p wire connection is also a caveat behind this heater problem.
How To Clear:
Firstly, check the 6p wire connection. If the wiring gets damaged, repair the wire connection. Once you fix the wiring issue, test the DC motor for proper operation. If the DC motor will not turn on, it’s time to replace the DC motor with a new one.
05. Eternal Tankless Water Heater Error Code e23
If the adjusted control valve of your eternal water heater is not connected properly, the digital monitor will display the error message e23.
How To Clear:
Inspect the wiring of 16p and adjust the valve wire for damage. If the wire connection is loose, secure it properly. Otherwise, you should repair the wire connection.
06. Eternal Tankless Water Heater Error Code e24
This error code will pop up if the mixing adjusts control valve gets defective or loosened.
How To Clear:
Clearing this error code from the display is just a piece of cake. Just follow these steps:
- The mixing control valve will make a noise when moving. Ensure you hear it.
- Inspect the wire connection between the mixing adjust the valve and the 16p wire.
We hope these steps will dissipate the error message.
07. Eternal Tankless Water Heater Error Code e26
When the adjusted control valve fails, your eternal water heater will show the error code e25.
How To Clear:
Below, we will discuss how to clear the error message e25. So, it’s worth checking the troubleshooting tips.
- Try to hear the noise when the control valve is moving.
- Ensure the wire connection of the 16p wire and the adjusted valve wire is secure.
08. Eternal Tankless Water Heater Error Code e27
The error code e27 will flash on the digital display if the mixing control valve initialization failure occurs.
How To Clear:
You can easily clear this error message from the display by correcting the wire connection of the 16p wire and the mixing valve wire.
09. Eternal Tankless Water Heater Error Code e28
This water heater issue will happen when the power line of the main gas valve remains open.
How To Clear:
Fixing this water heater problem is simple. Just follow the below tips:
- Inspect the thermostat. If needed, replace the thermostat with a new one.
- Check the thermal fuse to see whether it gets blown out or not. Change the thermal fuse if required.
- Replace the air pressure switch if it gets faulty
FAQs
Who makes eternal water heaters?
The Eternal water heater is manufactured in Taiwan by Grand Hall.
What does E5 mean on a water heater?
Your water heater will show the error code e5 if the pressure switch gets defective due to the defective motor or insufficient voltage.
What does EC mean on a water heater?
EC means Error Code Explanation on a water heater.
End-Notes
We only disclosed the meaning of the common 9 Eternal water heater error codes. But there are more error codes that will pop on your digital display. So, it’s better to leave a comment below if you can see other error codes- except the error messages we mentioned.
Eric Alvarez is the head of content on LilDutchUncle.Com. He is an HVAC guy based in El Paso, Texas, United States. He obtained his Bachelor of Science degree from the University Of Texas at El Paso. Years of experience in the HVAC field have taught him many lessons, not the least of which is that the value of quality and knowledge far exceeds any promised initial savings. He has a good standing reputation for superior skills in heating, air conditioning, hot water tanks, and indoor air quality systems.
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eric – getting the E02 again. nothing seems wet, company seems gone, suggestions?
Unfortunately, the Eternal water heater is no longer available on the market. It would be best to call a professional for help. You can read this article though the problem issued on water heater comes from another brand. Here is the link:
https://lildutchuncle.com/ao-smith-water-heater-code-e02/
Sorry, Rob…I can’t help in this case. Why don’t you call a professional yet? If you are using this hot water heater for years like five to seven years, you can replace it with a heater that comes from a trustworthy brand like Rheem, AO Smith, or American State.