Navien Tankless Water Heater Code E110: Causes And Solutions The user manual doesn't really describe much about the problem and users get confused easily when it comes to troubleshooting the code. And since it turned out that there are more than just two mentioned causes, it is better if you know all about them.. The 110 area code on a Navien is a blocked air intake or exhaust. First thing to do is inspect the piping outside to make sure it's not frozen or blocked or clogged with anything next would be to open up the door to the unit and look on the inside where they connect to the unit there is a screen that sometimes needs to be cleaned and it's in the top left-hand corner of the unit and it's.
Press the Power button to turn the unit off. Disconnect the water heater from the electric power supply. Remove the front panel.. 💥💥💥 My recommended yearly maintenance video: https://youtu.be/Zdl1IzlakrUHey Guys,I have a quick video here for you today on how I resolved the error 110.