25 York aircon error codes

Having york air conditioner problems or searching for York air conditioner error codes? We have you covered. This guide, we listed down the error code, the possible causes and corrective actions.

How to check york aircon error codes?

How to check york aircon error codes
  1. Hold down ON TIMER CANCEL button or OFF TIMER CANCEL button for 5 seconds, a “00 ” indication flashes on the temperature display section.
  2. Press ON TIMER CANCEL or OFF TIMER CANCEL repeatedly until indoor buzzer produces a long
    beep. This indicates the error code, refers to Error Codes table and is displayed on the temperature
    display section.

A note:

  • A short beep or two consecutive beeps indicate non-corresponding error codes.
  • To cancel the error code display, hold down ON TIMER CANCEL or OFF TIMER CANCEL button for 5 seconds. Alternatively, the code display will cancel itself if the button is not pressed for 1 minute.

York error code A6 (Indoor fan motor abnormal)

Corrective action : Call your local dealer

York error code C4 (Indoor heat exchanger thermistor short/open)

Corrective action :

  • Check indoor heat exchanger thermistor wire and connection
  • Check indoor heat exchanger thermistor resistance

York error code C9 (Indoor room thermistor short/open)

Corrective action :

  • Check indoor heat exchanger thermistor wire and connection
  • Check room thermistor resistance

York error code E1 (Room temperature sensor failure)

Supposed causes:

  • Faulty connector connection
  • Faulty thermistor
  • Faulty PCB

Method of malfunction detection: The temperatures detected by the thermistors are used to determine thermistor errors

Malfunction decision conditions: When the thermistor input is more than 4.92V or less than 0.08V during compressor

Troubleshooting : Be sure to turn off power switch before connect or disconnect connector, or else parts damage may be occurred

York error code E1 troubleshooting

York error code E4 (Indoor EEPROM error)

Supposed causes:

  • Faulty EEPROM data
  • Faulty EEPROM
  • Faulty PCB

Method of malfunction detection: The Data detected by the EEPROM are used to determine MCU

Malfunction decision conditions: When the data of EEPROM is error or the EEPROM is damaged

Troubleshooting : Replace the indoor or outdoor mainboard.

York error code E5 (Compressor motor lock)

Corrective action : Call your local dealer

York error code E6 (Compressor start-up error)

Corrective action : Call your local dealer

York error code E7 (Communication fault between indoor and outdoor)

Supposed causes:

  • Communication wiring disconnected.
  • The indoor PCB is broken.
  • The outdoor PCB is broken.
  • The Module PCB is broken.

Outdoor Display: LED1 flash 15 times

Method of malfunction detection: Communication is detected by checking the indoor PCB and the outdoor PCB

Malfunction decision conditions: The outdoor PCB broken leads to communication fault or the indoor PCB broken leads to communication fault.

Troubleshooting :

York error code E7 troubleshooting

York error code E8 (AC input over current)

Corrective action : Check input current

York error code E14 (Indoor fan motor malfunction)

Supposed causes:

  • Operation halt due to breaking of wire inside the fan motor.
  • Fan motor overheat protection
  • Operation halt due to breaking of the fan motor lead wires
  • Detection error due to faulty indoor unit PCB

Method of malfunction detection: The rotation speed detected by the Hall IC during fan motor operation is used to determine abnormal fan motor operation

Malfunction decision conditions: when the detected rotation feedback signal don’t received in 2 minutes.

Troubleshooting :

York error code E14 troubleshooting

York error code EA (4 way valve error)

Supposed causes:

  • Check indoor and outdoor heat exchanger temperture
  • During Heating, abnormal if indoor heat exchanger temperature < outdoor heat exchanger temperature
  • During Cooling, abnormal if indoor heat exchanger temperature > outdoor heat exchanger temperature

York error code F1 (The protection of IPM)

Supposed causes:

  • IPM protection dues to the compressor faulty
  • IPM protection dues to faulty PCB of IPM module
  • Compressor wiring disconnected

Outdoor Display: LED1 flash 2 times

Method of malfunction detection: IPM protection is detected by checking the compressor running condition and so on

Malfunction decision conditions :

  • The system leads to IPM protection due to over current
  • The compressor faulty leads to IPM protection
  • Circuit component of IPM is broken and led to IPM protection

Troubleshooting :

York error code F1 troubleshooting

York error code F3 (Communication fault between the IPM and outdoor PCB)

Supposed causes:

  • The outdoor PCB is broken
  • The IPM module is broken
  • Communication wiring disconnected

Outdoor Display: LED1 flash 4 times

Method of malfunction detection: Communication is detected by checking the IPM module and the outdoor PCB

Malfunction decision conditions: The outdoor PCB broken leads to communication fault or the IPM module broken leads to communication fault

Troubleshooting :

York error code F3 troubleshooting

York error code F4 (Overheat Protection For Discharge Temperature)

Supposed causes:

  • Electronic expansion valve defective
  • Faulty thermistor
  • Faulty PCB

Outdoor Display: LED1 flash 8 times

Method of malfunction detection: The Discharge temperature control is checked with the temperature being detected by the Discharge pipe thermistor

Malfunction decision conditions: When the compressor discharge temperature is above 110ć

Troubleshooting :

York error code F4 troubleshooting

York error code F6 (Heat exchanger overheat)

Corrective action : The air discharge of the outdoor heat exchanger unit could be clogged or blocked by dirt

York error code F8 (Outdoor DC fan motor fault)

Supposed causes:

  • DC fan motor protection dues to the DC fan motor faulty
  • DC fan motor protection dues to faulty PCB

Outdoor Display: LED1 flash 9 times

Method of malfunction detection: DC fan motor is detected by checking the fan running condition and so on

Malfunction decision conditions: When the data of EEPROM is error or the EEPROM is damaged

Troubleshooting :

York error code F8 troubleshooting

York error code F19 (Power voltage is too high or low)

Supposed causes:

  • Faulty IPM Module
  • Faulty compressor
  • Faulty power supply

Outdoor Display: LED1 flash 3 or 24 or 25 times

Method of malfunction detection: The current of the compressor is too high

Malfunction decision conditions: When the IPM Module is damaged or the compressor is damaged.

Troubleshooting :

York error code F19 troubleshooting

York error code F28 (Loop of the station detect error)

Supposed causes:

  • Faulty The wiring of compressor
  • Faulty compressor
  • Faulty PCB

Outdoor Display: LED1 flash 19 times

Method of malfunction detection: The position of the compressor rotor can not detected normally

Malfunction decision conditions: When the wiring of compressor is wrong or the connection is poor or r the compressor is damaged

Troubleshooting :

York error code F28 troubleshooting

York error code H9 (Outdoor air thermistor short/open)

Corrective action :

  • Check indoor heat exchanger thermistor wire and connection
  • Check outdoor air thermistor resistance

York error code J3 (Compressor discharge pipe thermistor short/open/misplaced)

Corrective action :

  • Check indoor heat exchanger thermistor wire and connection
  • Check compressor discharge pipe thermistor resistance

York error code J6 (Outdoor heat exchanger thermistor short/open)

Corrective action :

  • Check indoor heat exchanger thermistor wire and connection
  • Check outdoor heat exchanger thermistor resistance

York error code P4 (Heat sink thermistor short/open)

Corrective action :

  • Check indoor heat exchanger thermistor wire and connection
  • Check heat sink thermistor resistance

York error code U0 (Insufficient gas)

Corrective action :

  • Refrigerant leakage
  • Discharge pipe/ indoor or outdoor heat exchanger/indoor room/outdoor air thermistor disconnected

York error code U4 (Communication error)

Corrective action : Check communication wire and connection with indoor

York error code UA (Installation error)

Corrective action : Coupling only between Y5WMY10/15JF-Y5SLY10/15F and Y5WMY20/25J-Y5SLY20/25C3.

You may also like

2021 casement/window air conditioners buyer’s guide