Error code reference
Whirlpool Washer Error Code F 40
ATC Thermistor Open/Short
ATC Thermistor Open/Short – the ATC (Automatic Temperature Control) thermistor is detected to be open or shorted.
First step from the service manual
1
See TEST #5, page 5.
The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.
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F 40 on my Whirlpool WTW5000DW
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ATC Thermistor Open/Short – the ATC (Automatic
From Tech Sheet W13227384, p.36:
1.See TEST #5, page 5.
2.Disconnect the sensor and measure resistance at the sensor body. Expected: 10 kΩ to 12 kΩ at 77°F (25°C).
3.Check the sensor harness for opens and shorts. Back-probe the sensor pins at the control board connector; a reading outside 5 kΩ to 50 kΩ indicates a failed sensor.
Part WP8577274
Temperature thermistor
Related Whirlpool washer codes
All Whirlpool washer codes →- 1Drain time higher than 6 minutes, caused by pump failure…
- 1-1Control detected K2 pilot relay stuck closed (Pilot Stuck…
- 1-2Control software issue
- 10-1Other
- 10-3Other
- 14Electronic failure.
- 15Tub Water Thermistor Invalid
- 16Control failure.
View all 413 Whirlpool washer codes
- 17Dry Load Sense Timeout
- 18Drain Pump Clearing algorithm failed
- 19UI State Timeout
- 2Water level sequence reversed during filling, caused by…
- 2-1User interface stuck key detected by control in keypad or…
- 20Critical Flood Level by Gallons
- 203Blower Motor Inverter Fault
- 206Blower Motor Inverter Fault
- 209Blower Motor Inverter Fault
- 215Blower Motor Inverter Fault
- 216Blower Motor Inverter Fault
- 217Blower Motor Inverter Fault
- 22Out of Balance (OOB) during Dry Load Sense
- 220Blower Motor Inverter Fault
- 229Blower Motor Inverter Fault
- 23Critical Door Lock Failure
- 233Blower Motor Inverter Fault
- 24Door Logic Failure
- 241Blower Motor Inverter Fault
- 25Pressure Sensor Dropout
- 26Out of Balance (OOB) Fallback In Final Spin
- 27Water Accessibility
- 29Suds Lock Abatement Failure
- 2EPower Error
- 3Lower pressure switch opened during agitation, caused by…
- 3-1Thermistor/OWI open
- 3-2Shorted connection or component in Temperature Sensing…
- 303Compressor Motor Inverter Fault
- 306Compressor Motor Inverter Fault
- 311Compressor Motor Inverter Fault
- 317Compressor Motor Inverter Fault
- 318Compressor Motor Inverter Fault
- 319Compressor Motor Inverter Fault
- 322Compressor Motor Inverter Fault
- 33Drive Motor Inverter Fault
- 331Compressor Motor Inverter Fault
- 335Compressor Motor Inverter Fault
- 34Drive Motor Inverter Fault
- 340Compressor Motor Inverter Fault
- 343Compressor Motor Inverter Fault
- 350UI
- 351Drain Pump Clearing algorithm failed
- 352Compressor Discharge Overtemp
- 353Compressor Discharge Overtemp
- 354Compressor Discharge Thermistor Fault (NTC 1)
- 355Evaporator Thermistor Fault (NTC 2)
- 356Compressor Suction Thermistor Fault (NTC 3)
- 357Air Outlet Temperature Sensor Fault (NTC 4)
- 358Air Inlet Thermistor Fault (NTC 5)
- 359Multiple Thermistor Faults
- 360Humidity Sensor (RH) Fault
- 361Refrigerant Leak
- 362Humidity Sensor (RH) Fault
- 363Air Outlet Temperature Sensor Fault (NTC 4)
- 364Air Outlet Temperature Sensor Fault (NTC 4)
- 365Humidity Sensor (RH) Fault
- 37Heater fault
- 3EMotor Drive Error or Hall Sensor error
- 4Fill is longer than 20 minutes, caused by clogged water…
- 4-3Wash motor not running
- 4-5Control detected diverter disk in sump is missing.
- 41Drive Motor Inverter Fault
- 42Drive Motor Inverter Fault
- 44Drive Motor Inverter Fault
- 5NTC failure.
- 5-1Door switch stuck open
- 5-2Door switch stuck closed
- 57Door lock fault water above door by pressure
- 59Accelerometer Fault
- 6Critical Flood Level by pressure
- 6-1Wash motor has no communication
- 6-2Wash motor communication error between control and motor.
- 6-4Inlet water
- 6-8Inlet water
- 60Accelerometer Fault
- 63Accelerometer Fault
- 65Pressure Sensor Continuous Gallons Monitor
- 66Drive Motor Inverter Fault
- 67Drive Motor Inverter Fault
- 69Drive Motor Inverter Fault
- 7Circuit board failure (motor triac).
- 7-1No heat
- 7-2Heating
- 77Critical Door Lock Failure: Can't Unlock Door
- 7ESilver Care Kit (Silver Care PCB) Failure.
- 8Pressure Sensor Loss
- 8-1Low water/air in pump
- 8-2Draining
- 83Drive Motor Inverter Fault
- 87Accelerometer Fault
- 88Accelerometer Fault
- 89Accelerometer Fault
- 8EMEMS or Harness failure
- 9Door Switch Redundancy
- 9-1Slow drain
- 9-2Diverter
- 9-3Diverter
- 90Accelerometer Fault
- 99WiFi Communication Fault
- 9E1EMC Filter issue or a noise spike from an external device.
- A09No water detected entering washer or pressure switch trip…
- A10Long drain condition; drain time exceeds 4 minutes and…
- AECommunication Error between sub and main PBAs
- bEWater Supply Error
- CAAverage current limit trip
- CECommunications error between the machine controller and the…
- CIInstantaneous current limit trip
- d:01Motor control short circuited
- d:02Motor control interruption
- d:03Damaged motor control temperature sensor
- d:06Motor control NTC relay failure
- d:07Motor control (inverter) failed or motor shorted
- d:08Motor speed sensor failed
- d:09Voltage too high
- d:10Power limiter switch off
- d:11Voltage too low
- d:12Motor control high current switch off
- d:13Motor control high temperature switch off
- d:14Motor control high temperature warning
- d:15Power limiter warning
- d:16Motor high temperature switch off
- d:17Motor high temperature warning
- d:18Peak voltage too high
- d19Door unlock error (AccuTrac display equivalent for F29).
- d20Serial communication error (AccuTrac display equivalent for…
- d21Overflow condition (AccuTrac display equivalent for F27).
- d22Central Control Unit heartbeat failure (AccuTrac display…
- d23User Interface heartbeat failure (AccuTrac display…
- d24Water temperature sensor error (AccuTrac display equivalent…
- d3UI EEPROM error or UIC EEPROM error (AccuTrac display…
- d4Door switch error
- d5Coin 1 sensor is detected as blocked for 8 seconds (dryer…
- d6EEPROM error (AccuTrac display equivalent for F01).
- d7No water detected entering machine or pressure switch trip…
- d8Long drain (AccuTrac display equivalent for F21).
- d9Washer low voltage detection error
- dcUnbalanced load or cabinet bump detected during final spin…
- dEDoor is opened or not completely closed.
- DISPENSER SYSTEM ERRORThe dispenser motor cannot be driven to its proper position.
- dLDoor/lid lock failure
- DOOR LOCK ERRORAfter 6 failed attempts to lock the door.
- DOOR SWITCH ERRORThe door has not been opened for 3 consecutive cycles or…
- DOOR UNLOCK ERRORThe door unlock has failed 6 times.
- DRIVE MOTOR TACHOMETER ERRORThe control is unable to properly detect motor speed; the…
- dSDoor Error before operation
- dUDoor/lid unlock failure
- E:01Door open
- E:02Door lock doesn't unlock
- E:03Door lock doesn't lock
- E:04Door control broken
- E:05NTC open-circuited
- E:06NTC shorted
- E:07Unexpected heating (heater on at wrong time)
- E:08Heater doesn't shut off
- E:09Communication lost to motor
- E:12Water supply time exceeded
- E:13Drain pump time exceeded
- E:14Overflow level exceeded
- E:20Spinning aborted due to unbalanced load
- E:21Excessive foam
- E:22Frequency synchronization failed
- E:24Motor power relay failed
- E1Low/No Water Fill
- E2Switch Error / Main Relay Error
- E3Abnormal Spin
- E4Lid Open
- E5Class B Software Error
- EAWater Level Sensor error
- ECAbnormal Circuit Motor Pulse Detection
- EEEEPCB assembly is defective
- EEPROM ERRORA communication error between the Central Control Unit…
- ELLid Lock Malfunction
- EPEEPROM Abnormal
- ErProcessor reset error
- Er:10Flow meter gives wrong values
- Er:11No water flow within 6 minutes
- Er:15Pressure sensor gives failure voltage level
- Er:16Cannot calibrate pressure sensor
- F/02Long drain
- F/14EEPROM error
- F/15Motor Control Unit (MCU) error
- F/23Motor Control Unit error
- F/24Water temperature sensor error
- F/30Serial communication error
- F/dUDoor unlock error
- F/HNo water detected entering machine or pressure switch trip…
- F#E#General system error code (any F#E# code not specifically…
- F0Load detected in drum at start of CLEAN WASHER cycle…
- F0 E0No fault codes stored in memory.
- F01Dryer motor control circuit error
- F03Long drain
- F04Heating time too long
- F05Water temperature sensor error
- F06Motor Control Unit (MCU) error
- F07Motor overspeed; if the motor speed is not controlled, the…
- F08No water detected entering washer or pressure switch trip…
- F09Motor Control Unit (MCU) has internal failure; repeating…
- F0E1Load detected during the washer cleaning cycle
- F0E2Over suds condition detected; suds prevent the basket from…
- F0E3Overload fault displayed when the main control detects a…
- F0E4Spin limited by water temperature; displayed when the water…
- F0E5Off balance fault displayed when an off balance load…
- F0E6Machine orientation error
- F0E7Load detected when running Clean Washer cycle
- F0E8Water Ring
- F0E9Off Balance Pause
- F1Water temperature sensor (NTC) value is out of range (23°F…
- F1 E6Low voltage detected
- F10No water detected entering machine or pressure switch trip…
- F10E1Other
- F10E3Other
- F11Motor Control Unit error
- F12Heater safety failure.
- F12E0Communication between the Human Machine Interface and Wi-Fi…
- F13Motor Control Unit (MCU) error
- F16Control fault on control board.
- F18Suds (foam) detected during wash cycle
- F1E0Internal board failure.
- F1E1Pump driver/main relays/EEPROM error
- F1E2MCU Error
- F1E3Mismatch of ACU and UI; displayed when the user interface…
- F1E4Main relay open or shorted.
- F1E7Control board recognized line voltage below 90 V AC.
- F2Keypad/User Interface Failure
- F20No water detected entering machine or pressure switch trip…
- F21Excessive drain time; drain operation exceeds 8 minutes…
- F22Door lock error
- F25Drive motor tachometer error
- F26Door switch error
- F26EDispenser system error
- F27Overflow condition
- F28Water temperature sensor (NTC) error
- F29Door lock cannot unlock or door lock blockage; during…
- F2E0Shorted key.
- F2E1Indicates a stuck button (depressed for over 20 seconds) or…
- F2E2Mismatch of main control and UI; the User Interface…
- F2E3UI mismatch
- F2E4UI software error
- F2E5UI software error
- F3Lid Switch Failure
- F31Overheating of motor
- F32No fill
- F33Door switch error
- F34Maximum spin speed not reached
- F35Steamer communication failure
- F36Water level sensing not functioning
- F37Total steamer failure
- F38Steamer inlet valve failure
- F39Steamer time out reached
- F3E0Oven sensor opened.
- F3E1Water temperature sensor error
- F3E2Temperature system error
- F3E3Overflow condition
- F3E4Mini-bulk sensor failure
- F3E5Dry NTC open circuit fault; dry temperature sensor is out…
- F3E6Accelerometer fault
- F3E7Moisture sensor strip has shorted; only appears in service…
- F3E8Dry Temperature Sensor.
- F4Recirculate Pressure Switch Failure
- F41Motor RPS Thermistor Open/Short
- F42Not supported
- F43MCU thermal trip error
- F44MCU thermal trip error
- F4E0Heater is not detected
- F4E1Heater stuck on
- F4E2Heater not turning on; displayed when the heater has been…
- F4E3Restricted/low air flow that may affect dryer performance.
- F4E4Vent Fan Motor fault or Dry Blower Motor fault
- F4E5Drying Fan.
- F4E6Drying Heater.
- F5Pump driver fails to activate, one of the main relays is…
- F50Drain pump connection lost during the drain cycle
- F51Motor RPS Failure
- F52Motor Stop Failure
- F53Motor control over-temperature
- F54Motor Control Overcurrent
- F5E0Door and door position switches do not agree (Clean mode).
- F5E1Door switch error
- F5E2Lid lock will not lock or lid lock failure; displayed if…
- F5E3Door Unlock Error
- F5E4Door not opened between cycles
- F5E5Door switch error
- F5E6Door unlock error
- F6Motor speed detection error
- F60ACU failure/microprocessor failure
- F61User Interface heartbeat failure
- F64Steamer inlet valve failure
- F66Steam temperature sensor (NTC) error
- F68Saved code for Primary Control Failure (range F60-F68).
- F6E1Lid not opened between cycles
- F6E2Communication error between CCU and UI
- F6E3Communication error between CCU and UI
- F6E4Inlet Water
- F6E5Communication error between CCU and Expansion Board
- F7Serial communication error
- F70Dryer communication failure from dryer CCU to UIC
- F71Dryer communication failure from UIC to dryer CCU
- F72Basket Re-engagement Failure
- F73UIC microprocessor error
- F74UIC EEPROM error
- F77Off balance load detected.
- F7E0Loss of power; displayed when the main control detects…
- F7E1Drive Motor Tachometer Error / Washer Overload
- F7E10Motor disconnection error (also displayed as F7EA).
- F7E12MC/MCU Overload (also displayed as F7EC).
- F7E2MCU Fault or Motor Overheat
- F7E3Basket engaged during wash; displayed when the main control…
- F7E4Basket re-engagement failure; displayed when the shifter…
- F7E5Overflow condition
- F7E6MCU failure
- F7E7Motor unable to meet target RPM; displayed when the main…
- F7E8Motor over temperature
- F7E9Motor lock rotor
- F7EAMotor Phase Lost
- F7ECMotor Control motor overload fault
- F7EDFault of the motor control section of the main control.
- F8No water detected entering machine or pressure switch trip…
- F80Door lock failure (saved code for dL)
- F81Open/Close Door Lid
- F82Door lock failure
- F83Door unlock failure (saved code for dU)
- F84Door lock failure
- F85Door lock failure
- F88Suds lock; overdose of detergent detected during the wash…
- F8E0Steam Inlet Valve Error
- F8E1Long fill
- F8E2Overflow condition
- F8E3Overflow condition
- F8E4Flow Meter Fault
- F8E5Load detected in drum at start of Clean Washer cycle…
- F8E6No fill; water level does not change for a period of time…
- F8E7Steam Valve.
- F9Pump drive system error
- F99Not supported
- F9E1Drain pump system problem / long drain
- F9E2Drain pump system problem
- F9E3Diverter
- F9E9Wrong voltage detected at the appliance.
- FAAquastop failure
- FAE1Shipping Bolts Installed.
- FC E1Model/serial number not programmed
- FC E2Model/serial do not match
- FC E4USB fault
- FC E5Software update failure
- FC E6Model setup export failure
- FC E7Model setup import failure
- FCE0Communication between the Human Machine Interface and Wi-Fi…
- FCE3Antenna A (J2) bad (model WFL98 only).
- FCE8Wi-Fi module not responding or not connected.
- FdLDoor lock failure
- FFFill Failure
- FLFlood/overfill condition detected when excessive water in…
- FodSuds (foam) detected during wash cycle
- FPDrain fault
- FP E1Coin 1 circuit error
- FP E2Coin 2 circuit error
- FP E3Card reader communication failure.
- HCHot, Cold Reversed
- HrHeater Relay Error
- IEWater does not enter the washer (water inlet error).
- Incorrect Fill LevelPressure switch detects incorrect fill level; wash cycle…
- L2Low L2 voltage (less than 50V) detected at installation.
- LdLong drain condition
- LEWater Level Sensor trouble; the input signal from the water…
- LFWasher is taking too long to fill
- lidLid opened
- LODoor Unlock Fail
- Lo FloLong fill
- LOAD INSIDE DRUM DURING CLEAN WASHER CYCLEAt the start of the CLEAN WASHER cycle a load is detected…
- LoFLNo water detected entering washer or water level sensor…
- Long DrainDrain time exceeds 6 minutes, wash cycle stops; possible…
- LSLid switch error
- MAIN RELAYS ERROROne of the main relays is not working properly (relay might…
- MCU FAILUREIf the heat sink gets too hot, the Motor Control Unit (MCU)…
- MOTOR CONTROL UNIT ERRORThe Motor Control Unit has internal failure; repeating…
- nDDrain Error
- nFWater Supply Error
- nF1Fill Hoses Reversed
- NO WATER DETECTEDNo water detected entering machine or pressure switch trip…
- NSNot supported
- OBOut-Of-Balance
- OEWater supply circuit fault detected (high frequency); water…
- OFFMachine is out of service. Can be caused by
- oLOverloaded
- OVERFLOW CONDITIONThe overflow contact on the pressure switch is closed for…
- PFPower failure occurred while the dryer was running.
- PoPump out activated because the door lid has been left open…
- PUMP DRIVE ERRORThe pump driver fails to activate.
- PUMP DRIVE SYSTEM ERRORThe connection between the pump and the Central Control…
- rLLoad inside drum during cleaning washer cycle
- SdSuds lock
- SERIAL COMMUNICATION ERRORThe communication between the Central Control Unit (CCU)…
- SF1System Error
- SF2System Error
- SF3System Error
- SLSuds lock condition detected but the unit is unable to…
- Slow FillFill task exceeds 20 minutes, wash cycle stops; possible…
- SRSwitch Error
- SudSuds lock
- SUdSExcessive suds detected during the washing session; this is…
- tETemperature Sensor Error
- UELoad is out of balance or too small, preventing proper…
- uLUnbalanced Load
- Unexpected Fill During Agitation/SoakPressure switch contact opened during agitation task; wash…
- WATER TEMPERATURE SENSOR ERRORThe water temperature sensor (NTC) value is out of range…
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