Code decoder
Error codes by maker
Pick the maker and the equipment, or type the code. Each page says what the code means on that control, what is safe to check and when to stop.
- Codes
- 2,442
- Makers with codes
- 98
- Updated
- November 2026
W12Rancilio Espresso Machine Warning W12: Softener RegenerationRancilioW16Rancilio Espresso Machine Warning W16: Coffee Cleaning RequestedRancilioW18Rancilio Espresso Machine Warning W18: Fill Valve Short CircuitRancilioW19Rancilio Espresso Machine Warning W19: Fill Valve Wire BrokenRancilioW32Rancilio Espresso Machine Warning W32: Check the Message FileRancilioW33Rancilio Espresso Machine Warning W33: Check the USB ConnectionRancilioW34Rancilio Espresso Machine Warning W34: Purge the iSteamRancilioCHtRandell Prep Table Error Code CHt: Dirty Condenser AlarmRandellCONRandell Prep Table Error Code CON: High Condenser TemperatureRandellDOrRandell Prep Table Error Code dOr: Open Door AlarmRandellE0Randell Prep Table Error Code E0: Control Probe AlarmRandellE01Randell Prep Table Error Code E01: S1 Sensor FailureRandellE02Randell Prep Table Error Code E02: S2 Sensor FailureRandellE03Randell Prep Table Error Code E03: S3 Sensor FailureRandellE04Randell Prep Table Error Code E04: S4 Sensor FailureRandellE1Randell Prep Table Error Code E1: Defrost Probe AlarmRandellHI (Carel) / Hi (Danfoss)Randell Prep Table Error Code HI / Hi: High Temperature AlarmRandellLEARandell Prep Table Error Code LEA: Compressor Running Too LongRandellLO (Carel) / Lo (Danfoss)Randell Prep Table Error Code LO / Lo: Low Temperature AlarmRandellUHiRandell Prep Table Error Code uHi: Line Voltage Too HighRandellULiRandell Prep Table Error Code uLi: Line Voltage Too LowRandellIgnition controller error 22Rational Combi Oven Error Code 22: Top Burner Not IgnitingRationalIgnition controller error 38Rational Combi Oven Error Code 38: Flame After Bottom Valve ClosesRationalIgnition controller error 42Rational Combi Oven Error Code 42: Bottom Burner Not IgnitingRationalService 10Rational Combi Oven Error Code Service 10: High Water at SC PumpRationalService 11Rational Combi Oven Error Code Service 11: CDS Sensor Too Many PulsesRationalService 110Rational Combi Oven Error Code Service 110: CleanJet+care Cleaning MessageRationalService 12Rational Combi Oven Error Code Service 12: CDS Sensor No SignalRationalService 120Rational Combi Oven Error Code Service 120: Care Pump or ElectrodeRationalService 14Rational Combi Oven Error Code Service 14: Level Electrode No WaterRationalService 140.4Rational Combi Oven Error Code Service 140.4: Gas Warning Level 1-2RationalService 140.8Rational Combi Oven Error Code Service 140.8: Gas Lockout WarningRationalService 20.xRational Combi Oven Error Code Service 20.x: Temperature SensorRationalService 23Rational Combi Oven Error Code Service 23: Steam Relay ShortRationalService 24Rational Combi Oven Error Code Service 24: Hot Air Relay ShortRationalService 25Rational Combi Oven Error Code Service 25: CleanJet Water FlowRationalService 26Rational Combi Oven Error Code Service 26: Drain Valve Stuck ClosedRationalService 27Rational Combi Oven Error Code Service 27: Drain Valve Won't CloseRationalService 28Rational Combi Oven Error Code Service 28: Steam Generator Too HotRationalService 29Rational Combi Oven Error Code Service 29: Control Board Too HotRationalService 31.xRational Combi Oven Error Code Service 31.x: Core Probe Reading WrongRationalService 32.x (gas)Rational Combi Oven Error Code Service 32.x (gas): Ignition BoxRationalService 32.xRational Combi Oven Error Code Service 32.x: Gas Combustion LockoutRationalService 33 (gas units)Rational Combi Oven Error Code Service 33: Gas Unit MessageRationalService 33.xRational Combi Oven Error Code Service 33.x: Gas Blower ControlRationalService 34.xRational Combi Oven Error Code Service 34.x: Bus Signal ProblemRationalService 35Rational Combi Oven Error Code Service 35: UltraVent DisconnectedRationalService 36Rational Combi Oven Error Code Service 36: P1 Sensor DefectiveRationalService 37Rational Combi Oven Error Code Service 37: P1 Reading Out of RangeRationalService 40Rational Combi Oven Error Code Service 40: Care Pump Not DeliveringRationalService 41Rational Combi Oven Error Code Service 41: Solenoid Y3 or MoisteningRationalService 42Rational Combi Oven Error Code Service 42: Care Valve Y4 or HoseRationalService 43Rational Combi Oven Error Code Service 43: Valve Passing WaterRationalService 44Rational Combi Oven Error Code Service 44: No Steam During CleanJetRationalIgnition controller error 17Rational Combi Oven Ignition Controller Error 17: Flame Before GasRationalIgnition controller error 18Rational Combi Oven Ignition Controller Error 18: Flame After ShutoffRationalIgnition controller error 37Rational Combi Oven Ignition Controller Error 37: Bottom Burner FlameRationalBrewing unit overcurrentSchaerer Coffee Machine Error Code Brewing Unit OvercurrentSchaererHW boiler heating time-out, steam boiler heating time-outSchaerer Coffee Machine Error: Boiler Heating Time-OutSchaererHot water boiler NTC interrupted / steam boiler NTC interruptedSchaerer Coffee Machine Error: Boiler NTC InterruptedSchaerer
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Code not listed, or no code at all?
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