Author: Eric Alvarez

Ignition failure on a Navien tankless water Heater occurs due to gas supply issues, bad flame rod, insufficient gas pressure, and faulty gas pressure regulator.  Your water heater will notify you by throwing the error code E003 if there is a problem with ignition.  In this guide, I will break down every culprit responsible for…

The gas smell will come from the exhaust of your Navien Tankless Water Heater due to the following reasons:  Before breaking down those problems, I will first disclose whether the gas smell on the Navien Water Heater is normal or not. Then, I will describe what causes the unit to spit unburned gas out of…

Navien Tankless Water Heater keeps turning off if the defective flame rod is at fault or the heat exchanger gets clogged by mineral or scale formation.  If you want to prevent the unit from shutting down, you must replace the flame rod and flush the heat exchanger.  Apart from these, gas flow issues, tripped high…

Your Navien Tankless Water Heater will make a humming noise due to the following reasons: To stop the humming noise, you must fix those issues. And this troubleshooting guide will walk you through the step-by-step guide to solve the issues. So, keep reading. Why Is My Navien Tankless Water Heater Making A Humming Noise?  This…

This is a complete guide on Navien Tankless Water Heater Error Codes. From this article, what you will learn:  So, let’s get started from right here. Navien Tankless Water Heater Error Codes [Complete List]  This chapter will reveal both the meaning and how you reset a specific error code.  Navien E001 Error Code (Overheating Heat…

Navien E438 Error Code on the front panel display indicates the recirculation pump is working abnormally. So, what you need to do in this case is- check the recirculation pump and ensure it’s operating properly.  Apart from this, your Navien tankless unit can also pop up the error message due to a bad check valve…

Dirty or restricted air intake filter is the main culprit that causes your Navien Tankless Water Heater to throw the error code e110. Your water heater will not function unless you clean the air intake filter.  It means you can only clear the fault code e110 from the display when you remove the blockage from…

This is a complete troubleshooting guide on Navien Tankless Water Heater Code E003. What I am going to disclose in this article:  In short, you can learn how to clear error code E003 and let the water heater ignite & operate flawlessly.  So, let’s get started.  What Is Error Code E003 On Navien Tankless Water…

Some sort of noise out of your Navien recirculation pump is normal. However, if it generates annoying or buzzing noise, there is something wrong with the system.  Generally, your Navien recirculation pump will produce a humming noise because of the wrong size primary loop, not purging the recirculation pump, or foreign materials getting into the…

Navien Tankless Water Heater cycles on and off due to a clogged faucet aerator, bad flow sensor, and a restricted cold water inlet filter.  Apart from these, clogged exhaust venting and defective 3-way valves can also cause the unit to cycle on and off every 8-10 seconds.  All the culprits I mentioned actually cut-off the…

Scale or mineral deposit buildup in the heat exchanger is one of the main reasons that prevent your Rinnai Tankless Water Heater from getting hot enough.  Apart from this, your Rinnai water heater will not deliver enough hot water if you set the temperature too low or any error codes displayed on the controller.  If…