Rheem Tankless Water Heater Code 13 [5 Reasons & Solutions]
Error code 13 on Rheem Tankless Water Heater means poor or bad combustion. The unit will throw this fault code due to: You can easily reset the error code 13 by addressing and troubleshooting those issues. And this guide will walk you through each troubleshooting step to resolve the combustion issue. Let’s scroll down. Relevant:…