How to fix Rheem tankless water heater code 11 [Easy steps] NoTank

What does E5 mean on my Rheem tankless water heater? E5 on a Rheem Tankless Water Heater means there is a high flow rate. It means the desired water volume is too high that exceeds your desired preset temperature. To fix this issue, you need to slow down the flow rate. To learn further, read this article: Rheem Tankless Water Heater E5 Code.. A Rheem tankless water heater should last 15 to 20 years, and potentially longer with proper maintenance and a water supply that doesn't contain too many minerals. Tankless water heaters generally last considerably longer than tank-type heaters, as they don't hold corrosive water for prolonged periods.

By displaying a code on your tankless heater, you, or a professional, can read the code to understand what went wrong and how to fix it. A Rheem tankless water heater has over 30 potential codes, and the solution will differ depending on the specific make and model of water heater that you have. The most common codes include Codes 5, 11, 13.. 3. Rheem Water Heater Blinking Red Light Codes. The Rheem tankless heater flashes two colors depending on the type of problem: red and blue. Here are the details on what it means when the light blinks in red and how you can troubleshoot them. Rheem Gas Water Heater Red Light Code Flashing 1 Time