Manual & Troubleshooting

Rheem Tankless Water Heater will not power on or turn on due to one of the following reasons:  To discover each troubleshooting step in detail, keep reading.  Rheem Tankless Water Heater Will Not Power On [7 Easy Solutions] Here are the culprits that cause the water heater to not turn on:  1. Power Cord Isn’t…

This is a complete guide on Rheem Tankless Water Heater Error Codes. In this guide, we will describe the common error codes this tankless water heater displays. Besides, we will also depict those reasons that trigger the error messages and provide the solutions as well. So, let’s get started right here. Rheem Tankless Water Heater…

Rheem Tankless Water Heater Code 29 indicates that the neutralizer is not draining. This error code will flash on the controller display due to:  Below, I will walk you through each troubleshooting step to reset the Rheem error code 29.  Without further ado, let’s dive in.  Rheem Tankless Water Heater Code 29 [5 Causes &…

Rheem Tankless Water Heater Code 76 indicates a communication fault between the remote control and the tankless unit. The error code 76 will pop up on the controller display because of:  Once you address those issues and resolve them, the Rheem error code 76 will disappear. And this guide will take you through the troubleshooting…

Why does my Rheem tankless water heater display the error code 14? Your tankless water heater will throw this error message when the Overheat Film Wrap is at fault. And the Overheat Film Wrap gets activated if the heat exchanger gets too hot.  Improper fuel type, defective heat exchanger, clogged venting system, and faulty Molex…

Rheem Tankless Water Heater Code 12 means flame failure. The flame sensor fails to detect the flame due to:  Throughout this guideline, I will walk you through each troubleshooting step to reset the fault code 12.  Let’s dive in.  Relevant: Rheem Tankless Water Heater Error Codes  What Does Error Code 12 Mean On Rheem Tankless…

In this article:  When Should You Reset Your Rheem Tankless Water Heater? Resetting a tankless water heater will help you avoid general water heater issues like error codes, power outages, or water flow issues.   What happens when you reset the unit is- it will clear the glitches from the control board. But how?  The resetting…

This guide on Rheem RTEX-18 Troubleshooting will break down:  Note: This is an electric tankless water heater. If you have a gas unit, read this article on the Rheem Tankless Water Heater Troubleshooting Manual. Rheem Rtex-18 Troubleshooting: Common Problems & Solutions Here are the common problems you might experience:  1. Water Heater Isn’t Heating At…

This guide on Rheem Tankless Water Heater Troubleshooting Manual will walk you through common problems, including:  Rheem Tankless Water Heater Troubleshooting Manual [Common Problems & Solutions] Let’s troubleshoot the common problems and discover the solutions.   1. No Hot Water No hot water out of your tankless water heater will be a result of:  How To…

What you are going to explore:  What Is Code 11 On A Richmond Tankless Water Heater? No ignition represents the error code 11 on a Richmond Tankless Water Heater. Your tankless water heater will throw the fault code 11 due to one of the following reasons: The next chapter will walk you through every troubleshooting…

Richmond Tankless Water Heater Code 12 means flame failure as the unit fails to maintain a flame. It occurs due to gas supply issues, but is not limited to:  Throughout this article, I will walk you through every troubleshooting step to erase the error code 12 from the display.  So, let’s dive in.  Shall we?…