Manual & Troubleshooting

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…

Rinnai Tankless Water Heater No Hot Water [7 Easy Solutions] Rinnai Tankless Water Heater will produce no hot water because of these reasons:  Throughout this guideline, I will show you how to troubleshoot these issues and fix them. So, keep reading till the end.  Rinnai Tankless Water Heater No Hot Water [7 Easy Solutions] Now,…

Tankless water heaters, whether it comes from Navien or Rheem, function a little bit differently than a standard tanked unit. So, the problem you will experience with a tankless unit will be different.  For example, water goes cold while in the shower is the favorite one. There are several reasons responsible for this issue. But…

Your Navien Tankless Water Heater will deliver no hot water due to the following reasons:  In this Navien troubleshooting guide, I will walk you through every step to troubleshoot those issues. Plus, I will show you how to fix those water heater problems.  So, read on between the lines to discover the solution and let…

This is a complete guide on Navien Tankless Water Heater Problems, where I will break down these common tankless water heater issues: Apart from these, I will also disclose the meaning of Navien Tankless Water Heater error codes and their solutions.  In short, you can find every solution to the problem of your Navien Tankless…

Do you fail to figure out the reason behind the beeping noise of your Rinnai tankless water heater? If yes, you are not alone.  Like you, I also experienced this issue. Rinnai water heater will beep once it detects a problem within the water heater and alarms you by flashing an error code. The beeping…

Your Rinnai Tankless Water Heater will get no power due to a tripped GFCI outlet, faulty electric outlet you use to plug the unit, and bad PC board.  If you want to restore electric power to the unit, you must fix those issues. And this guide will walk you through the troubleshooting step to solve…

This is a complete guide on Rinnai Code 55 Reset. In this article, I am going to break down:  So, keep reading to discover the answers to these questions.  What Is Code 55 On Rinnai?  Code 55 on Rinnai water heater is a service indicator feature called Service Soon. This code will appear on the…

Every electric appliance starts malfunctioning over time. And your Rinnai tankless water heater is not an exception to that. Today or tomorrow, you will experience or go through these common Rinnai tankless water heater problems:  Today’s guide will break down each water heater issue so that you can solve those problems by yourself. As a…

The control panel on the Rinnai Tankless Water Heater will help you control the entire unit. Whether you need to increase the temperature or decrease, a functioning control panel is a must.  If the control panel is not working, you can’t even turn the unit on.  And guess what, a malfunctioning water heater will make…