Skip to main contentStart diagnosing 1c4c on your Whirlpool range→
What this code means
Power micro communication failure (CRC invalid).
First step from the service manual
Disable all outputs. Condition applies until Power On Reset.
Next steps: diagnose the root cause
1
Verify the error code is active
Power cycle the unit and see if the code returns. If it does, the fault is persistent and requires diagnosis.
2
Get the full diagnostic procedure
Get step-by-step guidance, test values, and wiring diagrams from the OEM service manual.
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Related Whirlpool range error codes
03/08Door and switches do not agree (door position disagreement).11Oven sensor opened (upper oven bake/broil circuit).12Oven sensor shorted (upper oven bake/broil circuit).1CShorted key detected on keypad.1c1cShorted key detected on control circuit board.1c2cKeyboard tail disconnected1c31Cancel key circuit problem (improper value) for upper/single oven cavity.1c32Cancel key circuit problem (improper value) for lower oven cavity.1c6cEEPROM access error (no response from EEPROM after 3 tries).1c7cControl not calibrated (calibration value out of range).1c81Cook profile corrupted in EEPROM for upper/single oven cavity.1c82Cook profile corrupted in EEPROM for lower oven cavity.1dBake/Broil range over temperature condition (alternate display code).1d11Runaway temperature (650°F) with door unlocked; sensor resistance >2237 ohms…1d12Runaway temperature (650°F) with door unlocked; sensor resistance >2237 ohms…1d21Runaway temperature (950°F) with door locked; sensor resistance >2787 ohms for…1d22Runaway temperature (950°F) with door locked; sensor resistance >2787 ohms for…21Oven sensor opened (lower oven circuit).22Oven sensor shorted (lower oven circuit).2CKeytail unplugged.31Latch error during CLEAN mode.32Latch error during CLEAN mode.3dBake/Broil range over temperature condition.3d11Temperature sensor failure (open) for upper/single oven cavity; sensor…3d12Temperature sensor failure (open) for lower oven cavity; sensor resistance…3d21Temperature sensor failure (short) for upper/single oven cavity; sensor…3d22Temperature sensor failure (short) for lower oven cavity; sensor resistance <0…3d41Meat probe shorted3d51Meat probe not calibrated4dInternal control error.4d11Door switch position failure for upper/single oven; door switch not closed when…4d12Door switch position failure for lower oven; door switch not closed when door…4d21No Reverse Airflow Fan rotation (no/low RPM) for upper/single oven.4d22No Reverse Airflow Fan rotation (no/low RPM) for lower oven.4d31Reverse Airflow Fan state error (on when supposed to be off) for upper/single…4d32Reverse Airflow Fan state error (on when supposed to be off) for lower oven.4d41High Reverse Airflow Fan rotation (high RPM) for upper/single oven.4d42High Reverse Airflow Fan rotation (high RPM) for lower oven.4d51Door switch circuit failure (not open or closed) for upper/single oven.4d52Door switch circuit failure (not open or closed) for lower oven.51Clean range over temperature condition.52Clean range over temperature condition.6CEEPROM communications error.7CInternal control error.8CInternal control error.9dDoor latch not operating properly.9d11Latch will not lock; lock switch not closed for upper/single oven.9d12Latch will not lock; lock switch not closed for lower oven.9d21Latch will not unlock; unlock switch not closed for upper/single oven.9d22Latch will not unlock; unlock switch not closed for lower oven.9d31Latch both locked and unlocked (lock and unlock switches both closed) for…9d32Latch both locked and unlocked (lock and unlock switches both closed) for lower…C-81Over temperature on induction cooktopC-82Over temperature on induction cooktopC-83Temperature sensor stuck on induction cooktopCAOver temperature condition.CFEasyConvect check food reminderCLnSelf-clean cycle is in progress; the oven door is locked and the cleaning…CLrNo error(s) founddoor LocOven door is in the process of locking (motorized lock engaging), displayed…door OPnOven has cooled sufficiently after self-clean and the door lock has disengaged…E/AExcess temperature of the induction element.E0Sub-code used with F1 (EEPROM communications), F2 (UL A/D errors), F3 (oven…E0 11Shorted key on ESEC20 surface element control.E0 13Bad EEPROM on ESEC20 surface element control.E0 14TST panel tail missing on ESEC20 surface element control.E0 15FMEA error (Failure Mode & Effect Analysis)E0 F6Lost communications.E0 F8Oven did not cool to 50°F within 4 hours and 20 minutes.E0 F9Product is mis-wired.E0-F1EEPROM communications failure, typically caused by power line noise or…E0-F2EEPROM checksum failure, typically caused by power line noise or lightning.E0-F3Key contact closed for more than 60 secondsE0-F5Clean temperature out of range (too high)E1Sub-code used with F1 (EEPROM checksum failure), F2 (shorted keypad/cable…E1 F6Over temperature during cook mode (runaway temperature).E1-F1EEPROM communications failure, typically caused by power line noise or…E1-F2EEPROM checksum failure, typically caused by power line noise or lightning.E1-F3Break in oven sensor circuit (open sensor, loosened or disconnected sensor…E1-F5Door switch open during clean cycleE2Oven temperature sensor openE2 F6Over temperature during clean mode (runaway temperature).E2-F1EEPROM communications error.E2-F2Latch error during self-clean operation.E2-F3Short in oven sensor circuit (short in sensor, sensor shorted to casing…E2-F5Door switch open during cleanE3Open oven temperature sensor or Electronic Oven Control failure.E3 F6Over temperature in warming drawer (runaway temperature).E3-F3Short in oven sensor circuitE3-F5Door latch not operatingE4Oven sensor opened.E5Door latch failureE5 F1Sensor usage out of range.E6Implausible configuration data, cooking zone switches off.E7Warming drawer sensor shorted.E7 F1PCB Thermistor/Sensor open or shorted.E8Generator synchronization error, cooking zone switches off.E9Temperature measurement error, cooking zone switches off.E9 F1WIDE Queue full.ECTimeout (Er63) or Software error (Er64), cooking zone switches off.EFHardware error (Er65), cooking zone switches off.EndEnd of a timed cooking or self-cleaning cycle; the oven has shut off…Er 20Continuous sensor activation; HMI turns off after 10 seconds.Er 22Flash memoryEr 31Button evaluation defective, HMI shuts off after 3.5-7.5 seconds.Er 36Incorrect configuration data or deviation between generator and HMI.Er 47NTC value defective on HMI; HMI turns off.ErrAn invalid pad (button) was pressed on the electronic oven control.FThe oven control system has detected a fault or anomaly; any error code…F-12Coil under current (induction cooktop)F-21Supply power frequency error (induction cooktop)F-25Stuck fan on Induction Power System (IPS)F-36Induction cooktop temperature sensor is not working (Type 1 failure, affects…F-37Induction cooktop temperature sensor is not working (Type 1 failure, affects…F-40Stuck fan on Induction Power System (IPS) (Right or left side fan, depending on…F-42Power supply error (induction cooktop)F-43Stuck fan on Induction Power System (IPS)F-47Power supply from Induction Power Control (IPC) to User Interface is missing…F-56Wrong or invalid configuration on induction cooktop (Type 3 failureF-58Power supply from Induction Power Control (IPC) to User Interface is missing…F-60Induction cooktop User Interface does not work (Type 3 failureF0Default F codeF0-E0No failure present; displayed only when user presses and holds CANCEL/OFF key…F01Oven temperature sensor circuit is open.F02Welded element relays detected on the electronic range control.F03EEPROM error in the electronic range control.F05Door or latch problems detected.F06Electronic range control malfunction.F1Analog-to-digital failure, shorted keypad (3- or 4-digit display only), or…F1 E4Model ID error (Tulsa/Celaya); Internal error (Oxford).F1 E6Latch signal mismatch error (Tulsa/Celaya); Internal error (Oxford)F1 E8Internal error (Oxford)F1 E9Internal error (Oxford)F1 EOEEPROM communication error.F1-E3Electronics subsystem failureF1-E5Electronic control malfunctionF1-E7PCB Thermistor/Sensor open or shorted (cooktop control).F10Runaway temperatureF11Shorted keypad or selector switch.F13EOC internal software error or failure.F14Membrane switch tail missing or not connected.F1E0User Interface Board EEPROM Communication ErrorF1E1Control Relay Board EEPROM Communication ErrorF1E2Lower RTD sensor not calibrated (internal control fault).F2Oven temperature sensor open or short circuit, or oven temperature too high…F2 E6STOP/CLEAR key contact closed for more than 60 secondsF2 EOShorted keypad / key stuck.F2-E0Key contact closed for more than 60 seconds due to key held down too long…F2-E3Oven temperature too highF2-E4Keypad subsystem failureF2-E5Keypad subsystem failureF2-E7Cancel key error (variant).F20Communication failure between EOC and ESEC system.F2E1Stuck Key / Button Functionality ErrorF2E2Oven Knob Rotary Encoder Open/ShortedF3Oven sensor or over-temperature failureF3 E0 (door/latch)Door and latch switches do not agree.F3 E1 (door/latch)Solenoid not operating or latch switch failure.F3 E2 (door/latch)Latch during CLEAN error.F3 E4Oven sensor openedF3 E5Oven sensor shortedF3-E6Warm drawer sensor open (warming drawer sensor open).F3-E7Warm drawer sensor shorted (warming drawer sensor shorted).F30Open oven sensor probe circuit.F31Shorted oven sensor probe circuit.F3E0Main Oven Sensor Open or ShortedF3E1Left Oven Sensor Open or ShortedF3E2Drawer Sensor Open or ShortedF3E3Main Oven Meat Probe Short-CircuitF3E9Left Oven Meat Probe Short-CircuitF4Door latch system failureF4 E2Over temperature during cook cycle (temperature runaway error).F4 E3Over temperature during clean cycle (temperature runaway error).F4 E7Over temperature cavity 2 (temperature runaway error in second cavity).F4-E0Door is open but latch is locked (door switch closed indicating open, latch…F4-E1Meat probe failureF4-E5Self-clean temperature of 550°F (288°C) not reached within 45 minutes.F5Door and latch switches do not agree (door switch open indicating open door and…F5 E6Centertap voltage failure (Tulsa/Celaya).F5 E7Unlock door error / cannot unlock doorF5-E0Door switch open during cleanF5-E1Latch switch not operatingF5-E5Latch subsystem failureF5E2Door and door position switches do not agree during Clean mode (LCC/LCX…F5E3Left Oven Door Latch SwitchF5E4Left Oven Door Latch MotorF6Return pulse line from switch not connectedF6 E5No cavity size commandF6E0User Interface Connection LostF6E1Main Oven Over Temperature LimitF6E2Clean mode runaway temperature (oven temperature exceeded safe limit during…F6E3Left Oven Over Temperature LimitF6E4Oven User Interface UI and ACU state status mismatchF6E6Main Oven Control ConnectionF6E7Lost communication between UI and AM2.F6E9Left Oven Control ConnectionF7Control or keypad switches shorted.F7-E0Common switch wire is defectiveF7E1Boiler Over Temperature Limit (steam models)F7E2Boiler Temperature Out of Range (steam models); water temperature sensor…F7E3Improper filter reset.F7E4Conductivity sensor not connected.F8Oven sensor shorted.F8E0Cooling Fan Speed Too LowF8E1Left Oven Cooling Fan Speed LowF8E2Main Oven Cooling Fan Speed HighF8E3Left Oven Cooling Fan Speed HighF8E4Left blower low speed too high.F8E6Left blower high speed too high.F9House wiring is miswired; incorrect power supply voltage.F90Door lock motor or latch circuit failure.F91Door lock motor or latch circuit failure.F92Door lock motor or latch circuit failure.F93Door lock motor or latch circuit failure.F94Door lock motor or latch circuit failure.F95Door lock motor or latch circuit failure.F9E0Power InputGoodNo failure detected; displays only when user enters diagnostic mode and there…HFixed coil temperature indicated by blinking H on display.HLdKeep Warm mode is active or has been selected, maintaining oven temperature at…HotOven is still hot after Self Clean cycle has finished; door remains locked…LocControl Lock is active; control panel pads are locked to prevent unintended use…OPnOven door may now be opened after the oven has cooled sufficiently following…PFA reset has occurred in the Electronic Range Control (ERC), typically caused by…PSHPush to Start reminder indicating the START pad was not pressed within 5…SAbSabbath mode is activeSFSabbath failureU 400Communication error between HMI and induction.
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