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Error code reference
Sub-Zero Refrigerator Error Codes
297 error codes documented with diagnostic procedures.
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--Unit is in shutdown mode; all unit functions suspended except lights and door alarm.01Zone X Cabinet Thermistor Failure (Device or Wiring).02Zone X Evaporator Thermistor Failure (Device or Wiring).03Zone X Condenser Thermistor Failure (Device or Wiring).04Ambient Thermistor Failure (Device or Wiring).05Refrigerator cabinet thermistor read open or shorted for 10+ seconds, or repeatedly read…06Refrigerator evaporator thermistor read open or shorted for 10+ seconds, or repeatedly…07Lower cabinet thermistor read open or shorted for 10+ seconds, or repeatedly read erratic…08Lower evaporator thermistor read open or shorted for 10+ seconds, or repeatedly read…10Thermistor fault10 0 00Condenser thermistor open circuit detected.10 0 01Condenser thermistor short circuit detected.10 0 02Condenser thermistor unstable signal detected.10 1 00Refrigerator compartment thermistor open circuit.10 1 01Refrigerator compartment thermistor shorted/closed.10 1 02Zone 1 cabinet thermistor unstable signal detected.10 1 10Zone 1 evaporator thermistor open circuit detected.10 1 11Zone 1 evaporator thermistor short circuit detected.10 1 12Zone 1 evaporator thermistor unstable signal detected.10 2 00Zone 2 cabinet thermistor open circuit detected.10 2 01Zone 2 cabinet thermistor short circuit detected.10 2 02Zone 2 cabinet thermistor unstable signal detected.10 2 10Zone 2 evaporator thermistor open circuit detected.10 2 11Zone 2 evaporator thermistor short circuit detected.10 2 12Zone 2 evaporator thermistor unstable signal detected.10 3 00Zone 3 cabinet thermistor open circuit detected.10 3 01Zone 3 cabinet thermistor short circuit detected.10 3 02Zone 3 cabinet thermistor unstable signal detected.10 3 10Zone 3 evaporator thermistor open circuit detected.10 3 11Zone 3 evaporator thermistor short circuit detected.10 3 12Zone 3 evaporator thermistor unstable signal detected.10 7 00Ambient thermistor on control board open circuit detected.10 7 01Ambient thermistor on control board is shorted.10 7 02Ambient thermistor on control board is unstable.10 C 00Condenser thermistor open circuit detected.10 C 01Condenser thermistor short circuit detected.10 C 02Condenser thermistor unstable signal.10 F 00Freezer evaporator thermistor open circuit.10 F 01Freezer evaporator thermistor shorted/closed.10 F 02Freezer evaporator thermistor unstable.10 F 10An open Zone 4 evaporator thermistor.10 F 11Short in Zone 4 evaporator thermistor.10 F 12Zone 4 evaporator thermistor is unstable.10 r 00Refrigerator evaporator thermistor open circuit.10 r 01Refrigerator evaporator thermistor shorted/closed.10 r 02Refrigerator evaporator thermistor unstable.10 r 09Refrigerator evaporator thermistor read higher than cabinet thermistor by at least 10…11Upper cabinet cold temperature alarm (wine storage section).12Lower cabinet warm temperature alarm (wine storage section).13Lower cabinet cold temperature alarm (wine storage section).15Sealed system fault15 1 00Zone 1 compressor relay stuck open15 1 01Refrigerator Compressor Relay is stuck closed; power to compressor at all times.15 2 00Zone 2 compressor relay stuck open15 2 01Freezer Compressor Relay is stuck closed; power to compressor at all times.15 3 00Zone 3 compressor relay stuck open15 3 01Zone 3 compressor relay stuck closed15 4 00Defrost relay is stuck open, caused by no voltage feedback through the defrost terminator.15 4 01Defrost relay is stuck closed, caused by voltage feedback through the defrost terminator.15 8 00Ice maker relay is stuck open; no power to ice maker.15 8 01Ice maker relay is stuck closed; power to ice maker at all times.15 8 10Ice Accessories Relay is stuck open; no power to ice accessories (fill tube heater…15 8 11Ice accessories relay stuck closed; power to fill tube heater and mullion heater at all…15 9 00Dispenser auger relay is stuck open; no power to auger.15 9 01Auger relay is stuck closed; power to auger at all times.15 9 65Water valve selecting relay stuck at dispenser water position15 9 66Water Valve Selecting Relay stuck at Icemaker water position.15 C 00AC Condenser Fan Relay stuck open15 C 01AC Condenser Fan Relay stuck closed15 L 00Main lights relay is stuck open; power to lights at all times.15 L 01Main Lights Relay is stuck closed; no voltage to lights.15 L 55Accent lights triac open.15 L 56Accent lights triac shorted15 U 00Water valve no current detected15 U 01Water valve current detected15 U 10Water check valve relay is stuck open; no power to water check valve.15 U 11Water check valve relay is stuck closed; power to water check valve at all times.20Defrost under-heat with no voltage feedback through Gray/White wire at defrost start.20 2 00Defrost bi-metal stuck open.20 2 01Defrost bi-metal stuck closed.20 2 05Defrost bi-metal miswire with normal temps; inappropriate response from bi-metal during…20 2 06Defrost bi-metal miswire with overheat; high temps during defrost and inappropriate…20 2 07Defrost bi-metal error.20 2 50Defrost heater open circuit detected.20 4 00Defrost heater open circuit.20 4 42Defrost system primary heater fault.20 4 50Defrost heater has failed open.20 4 55Defrost heater triac open.20 4 56Defrost heater triac short.21Check Zone X Defrost Bi-metal for Proper Operation.22No voltage feedback through Gray/White wire at defrost start.23Defrost overheat with no voltage feedback through Gray/White wire at defrost start.24Defrost under-heat condition detected.30Ice/water/accessory fault30 8 00Ice accessories open circuit.30 8 05Icemaker no water valve input signal30 8 10Ice maker open circuit.30 8 30Water valve not opened but water detected passing through flow meter (flood warning).30 9 01Bulk ice switch stuck closed; pressed or closed for more than five seconds with door…30 9 10Dispenser auger open circuit.30 9 80Chute motor timed out30 9 86Dispenser chute motor timed out; chute motor failed to reach open or closed position.30 U 00Water valve open circuit.30 U 10Dispenser water valve open circuit.30 U 20Water check valve open circuit; solenoid is open.30 U 30Water valve solenoid energized for more than 35 seconds; icemaker system disabled.35Fan fault35 1 00Zone 1 evaporator fan open circuit detected.35 1 33Zone 1 fan speed faster than setting35 1 34Zone 1 fan speed set too high35 1 35Refrigerator evaporator fan speed error.35 1 36Refrigerator evaporator fan current too low.35 1 37Refrigerator evaporator fan current too high.35 1 38Refrigerator evaporator fan power output fault.35 1 39Refrigerator DC fan output fault.35 2 00Zone 2 evaporator fan open circuit detected.35 2 33Zone 2 fan speed set too low35 2 34Zone 2 fan speed set too high35 2 35Freezer evaporator fan speed error.35 2 36Freezer evaporator fan current too low.35 2 37Freezer evaporator fan current too high.35 2 38Freezer evaporator fan power output fault.35 2 39Freezer DC fan output fault.35 3 00Zone 3 evaporator fan open circuit detected.35 3 33Zone 3 fan speed set too low35 3 34Zone 3 fan speed set too high35 A 00Air filter fan open circuit detected.35 A 36Air filter fan is not connected properly or not functioning.35 A 37Air filter fan short or connection problem.35 C 00DC condenser fan open circuit detected.35 C 33DC condenser fan speed set too low35 C 34DC condenser fan speed set too high35 d 36Drawer Fan current is too low.35 d 37Drawer fan current is too high.35 F 33Freezer evaporator fan running faster than its setting, possibly shorted.35 F 34Freezer evaporator fan shorted; runs faster than speed setting.35 r 33Refrigerator evaporator fan running faster than its setting, possibly shorted.35 r 34Refrigerator evaporator fan shorted; runs faster than speed setting.40Zone X Excessive Run40 1 00Zone 1 stepper current fault40 1 09Zone 1 house alarm40 1 38Refrigerator stepper valve communication fault.40 1 40Excessive refrigerator compressor run time.40 1 87Zone 1 stepper cooling fault40 2 00Zone 2 stepper current fault40 2 09Zone 2 house alarm40 2 38Freezer stepper valve communication fault.40 2 40Excessive freezer compressor run time.40 2 87Zone 2 stepper cooling fault40 3 09Zone 3 house alarm40 3 40Zone 3 excessive compressor runtime.40 4 40Zone 4 excessive compressor runtime.40 8 40Ice maker ran for maximum fill time without achieving necessary volume.40 9 40Dispenser excessive runtime40 b 00Baffle stepper current fault.40 b 38Baffle stepper communication fault.40 b 87Baffle cooling/position fault.41Check Zone X Compressor and Wiring.42Check Condenser Fan and/or Wiring.43Check Left Refrigerant Valve and Wiring.44Glass heater fault44 0 00Glass door heater open circuit.44 0 01Glass door heater short circuit.44 1 44Refrigerator glass door heater output fault.44 9 42One-watt glass well heater not detected.44 9 43Four-watt glass well heater not detected.44 H 44Glass door heater output fault.45Errors Detectable with Red Door Switches45 1 00Lights open circuit45 1 01Lights short circuit45 2 00Lights open circuit45 2 01Lights short circuit45 3 00Open in Zone 3 light circuit.45 3 01Short in Zone 3 light circuit.45 A 45Air purifier light burned out.45 F 00Open in Zone 4 light circuit.45 F 01Short in Zone 4 light circuit.45 L 00Accent lights open circuit.45 L 01Accent lights short circuit.45 L 45Burned out light detected.46Check Ice Accessory Wiring for Open Circuit.47Check Accent Lighting Wiring for Short Circuit (Zone 3).50Excessive Refrigerator Compressor Run (Model 700BCI) or Excessive Refrigerator Fan Run…50 U 80Water flow meter not detected.50 U 86Water Flow meter detected low flow.50 U 87Water flow meter did not detect flow.50 U 90Flow meter framing errors.55Zone thermistor is shorted in the indicated zone.60Load/component fault60 1 02Refrigerator variable speed compressor communication error.60 1 38Refrigerator variable speed compressor communication error.60 1 60No refrigerator compressor load detected.60 2 02Freezer variable speed compressor communication error.60 2 38Freezer variable speed compressor communication error.60 2 60No freezer compressor load detected.60 6 60Compressor load open / no load detected.80High variable speed compressor differential pressure or low voltage supplied to VS…81High amperage draw at variable speed compressor (700TF/I-2V only).82VS compressor could not maintain lowest minimum speed at highest current draw (700TF/I-2V…83Replace Zone X Variable Speed Compressor and Filter-Drier.84Short circuit at VS compressor controller output circuit (700TF/I-2V only).85VS compressor converter overheated and shut down VS compressor (700TF/I-2V only).86Serial communication failure between VS compressor controller and electronic control…87Speed information from electronic control board is out of specification (700TF/I-2V only).88Electronic control board not receiving status data in response to speed commands…89Check Icemaker Solenoid Valve and Wiring.90Control fault90 0 70Flash failure on control board.90 0 71Flash failure on control board.90 0 72Flash failure on control board.90 0 73Flash failure on control board.90 0 74Flash failure on control board.90 0 75Flash failure on control board.90 0 81Microcontroller fault.90 0 90Microcontroller fault.90 0 92Microcontroller fault.90 0 93Microcontroller fault.90 3 38Condenser fan triac is faulted.90 3 55Condenser fan triac open.90 3 56Condenser fan triac shorted.90 5 01Key shorted or damaged on Control Panel.90 5 38Key shorted or damaged on display.90 5 39Key shorted or damaged on display.90 5 44Glass door heater output fault.90 5 70Control bad flash write.90 5 71Control flash initialized.90 5 72Control flash memory bad.90 5 73Invalid log fault checksum.90 5 74Invalid E2 checksum.90 5 75Invalid model E2 checksum.90 5 80No communication between control board and user interface.90 5 81Communications time-out.90 5 82Partial communications failure.90 5 83Bad micro communication.90 5 84Micro initialization fault.90 5 85User display failure.90 5 95Key shorted or damaged on control panel.90 5 96Key shorted or damaged on Control Panel.90 5 97Control panel microcontroller problem.90 5 99Initialization fault.90 9 80No communications with door dispenser.90 A 38Air filter fan output fault on control board.90 A 56This code is inactive90 b 80No stepper microcommunication.90 d 38Drawer fan output fault on control board.90 F 38Freezer evaporator fan output fault on control board.90 H 80High voltage micro (CCM) no communication90 H 82High voltage micro (CCM) partial communication90 H 83High voltage micro (CCM) bad communication90 H 84High voltage micro (CCM) initialization fault.90 L 38Accent lights output fault on control board.90 r 38Refrigerator evaporator fan output faulted.91Primary on accent LED power supply failure92Check Keypad Wiring.93Replace Keypad.94Check Wiring / Replace User Display #1 (Zone 1) or User Display #2 (Zone 3), depending on…94 (Zone 1)Check Wiring / Replace User Display #1 (Left/Freezer)94 (Zone 3)Check Wiring / Replace User Display #2 (Right/Refrigerator)95Diagnostics fault95 1 00Refrigerator compressor microprocessor pin stuck in off position.95 1 01Refrigerator compressor microprocessor pin stuck in on position.95 1 25Refrigerator evaporator not cooling properly when compressor is on.95 2 00Freezer compressor microprocessor pin stuck in off position.95 2 01Freezer compressor microprocessor pin stuck in on position.95 2 25Freezer evaporator not cooling properly when compressor is on.95 3 00Door #3 excessive open time.95 5 25Diagnostics failure.95 F 00Door #4 excessive open time.96Datalogger Malfunction.97Check Communications Cables / Connectors.98Power fault98 0 98Brownout conditions were detected.98 H 98Power brownout detected.98 H 99Power brownout detected.Control board light - rapid flashThermistor detected temperatures exceeded 170°F (77°C), indicating an over-temperature…Control board light - slow flashLiquid line thermistor is open or disconnected.d0 0rFrench door model internal dispenser door left open for more than five minutes when unit…dO OrDoor is left open more than 5 minutes; door ajar alarm is off; audible alarm chimes until…E0Communication error between control board and control panel (base units only).E3Communication error between control board and control panel (base units only).ECError Code indicator displayed in the right LCD area during Diagnostic Mode, indicating…EEFaulty refrigerator compartment thermistorH2 L03.8 liters of water dispensed in 15 minutes or dispenser water valve energized for 150…H2 LOOver 1 gallon of water dispensed in 15 minutes, or water valve energized 150 secondsICEFlashing ICE and SERVICE annunciators indicate icemaker water valve solenoid was…ICE SERVICEWater valve was energized for more than 15 secondsL0 CControl panel locked because display icons were tapped while the door was closed.LO CControl panel lockedRapid flashControl board light rapid flash indicates liquid line temperature exceeded 170°F on…REPLACE FILTERThe ice machine has completed 8000 freeze/harvest cycles and the water filter needs…Replace Filter (Red)Red filter light energizes after 8000 freeze/harvest cycles to indicate the water filter…SERVICEService indicator flashing indicates a component fault detected by the electronic control…SERVICE + ICEWater valve was energized for more than 15 seconds; power to icemaker system is…Slow flashControl board light slow flash indicates a thermistor problem (open or disconnected) on…Steady lightControl board light steady indicates thermistor operation is normal on UC-15I ice machine.SuBlue wire of display cable is unhooked or faulty; top lights off.VACUUM CONDENSERExcessive compressor run time detected
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Common questions
How do I find the error code on my Sub-Zero Refrigerator?
Most Sub-Zero refrigerators show the code directly on the control panel display. If your model has no display, it can be read by entering diagnostic mode with the key sequence for your model. The full procedures include model-specific instructions for reading codes.
Are these codes specific to my model?
The codes here apply broadly to Sub-Zero refrigerators. Meanings and diagnostic steps can vary by model and production year, so enter your model number for model-specific information and procedures.
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