The flashing code ‘8-1 FVS’ on the water heater indicates the FVS fault is detected and your Rheem Water Heater enters Hardware Error Lockout.  If you want to bring your water heater back to normal operating condition, you should find the source of this issue and solve it. And this troubleshooting guide will help you … Continue reading Rheem Water Heater 8 Flashes Then 1: What Does It Mean?