Alarm Codes - Rheem HB Series Use & Care Manual

Troubleshooting Alarm Codes
Troubleshooting Tips
Save time and money! Review the chart on this page first
and you may not need to call for service.
The water heater will make an audible beep for notification of Alarms. The
following steps should be used in determining the Alarm code:
1) Press Blinking "Service"
Button on the Home Screen
2) Press Blinking "Alarm"
!
Button on the Service Screen
3) Alarm will be listed on
Alarm Screen
The following page details
Alarm code
18
Current Alarm
History of all Alarms.
(up to 25 Alarms)