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Rheem Water Heater Error Codes: Meanings & Safe Checks
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1L Rheem water heater 1L means Water heater has buildup of lime deposits. See the verified model scope, safe checks, and official source. Search/display variants: 1L caution 11 Rheem water heater 11 means The gas shut-off valve is not fully opened, or gas service has been interrupted. Search/display variants: 11 caution 12 Rheem water heater 12 means LP gas is running low (LP models only). See the verified model scope, safe checks, and official source. Search/display variants: 12 caution 14 Rheem water heater 14 means Water heater is overheating. See the verified model scope, safe checks, and official source. Search/display variants: 14 caution 29 Rheem water heater 29 means Neutralizer is clogged. See the verified model scope, safe checks, and official source. Search/display variants: 29 caution 31 Rheem water heater 31 means Faulty inlet thermistor. See the verified model scope, safe checks, and official source. Search/display variants: 31 caution 33 Rheem water heater 33 means Faulty outlet thermistor. See the verified model scope, safe checks, and official source. Search/display variants: 33 caution 61 Rheem water heater 61 means Faulty blower motor. See the verified model scope, safe checks, and official source. Search/display variants: 61 caution 66 Rheem water heater 66 means Faulty bypass motor. See the verified model scope, safe checks, and official source. Search/display variants: 66 caution 71 Rheem water heater 71 means Solenoid valve circuit failure. See the verified model scope, safe checks, and official source. Search/display variants: 71 caution 88 Rheem water heater 88 means Reminder of flushing the heat exchanger and/or replacing the water treatment filter. Search/display variants: 88 routine 90 Rheem water heater 90 means Air intake or vent exhaust opening may be blocked; or the vent pipes on the vent termination may not be connected properly. Search/display variants: 90, 99 caution P1 Rheem water heater P1 means Not enough water flow to operate the unit. See the verified model scope, safe checks, and official source. Search/display variants: P1 caution