Rheem Error Codes

Find troubleshooting guides for all Rheem error codes.

3 error codes across 1 appliance types

Waterheater

Code	Meaning	Severity
11	Code 11 on a Rheem tankless water heater means the unit attempted to ignite the burner and failed after multiple tries. The control board detected no flame signal and shut down as a safety measure. high	high
HUB	Rheem tankless water heaters display numeric error codes on the LCD when the unit detects a fault in the gas supply, ignition, venting, or sensor circuits. These codes help identify the specific failure before calling a technician. low	low
NO-HOT-WATER	Gas, Electric, and Tankless Diagnosis medium	medium