Rheem · Tankless Water Heaters
The 'Alarm/Error Indicator' light illuminates when the water heater detects a fault or requires attention. The specific issue may be displayed on the LED screen or indicated by an error code.
Click steps to track your progress.
Check the LED display for any error codes.
Refer to the troubleshooting section of the manual for the displayed code.
If no code is displayed, consider basic troubleshooting like resetting the unit.
Contact qualified service personnel if the issue persists.