Rinnai Fault Code 57
Fault: Burner Overheat Bi-Metal Switch
Applies to: Rinnai Infinity 26 Touch REU-AM2626, WDLInfinity 26 REU-AM2626, WDInfinity 20 REU-AM2024, WDInfinity 16 REU-AM1620WD, Infinity 12 REU-AM1220 WD, B26 REU-A2626 WB, B20 REU-A2024WB B16 REU-A1620WB Units.
Your Rinnai continuous flow water heater has a self diagnostic capability. If a fault occurs, an error code will flash on the digital monitor (if you have water controllers) or status monitor (selected models only). This assists with diagnosing the fault.