Error code reference
Whirlpool Washer Error Code SERIAL COMMUNICATION ERROR
The communication between the Central Control Unit (CCU) and the Motor Control Unit (MCU) cannot be sent…
The communication between the Central Control Unit (CCU) and the Motor Control Unit (MCU) cannot be sent correctly.
First step from the service manual
1
Unplug washer or disconnect power, then check wire harness connections to the MCU, the motor, and CCU.
The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.
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SERIAL COMMUNICATION ERROR on my Whirlpool WTW5000DW
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The communication between the Central Control
From Tech Sheet W10807500, p.32:
1.Unplug washer or disconnect power, then check wire harness connections to the MCU, the motor, and CCU.
2.Inspect the communication harness between the main control and the UI board for bent pins or unseated connectors at each end.
3.Measure supply voltage to the UI board. Expected: 5 VDC at the interface connector; a low or missing rail points back to the main control supply.
Part W10811169
User interface control board
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 40ATC Thermistor Open/Short
- 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
- 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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