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 … Continue reading Rheem Tankless Water Heater Will Not Power On