York central air conditioners are highly regarded for their energy-efficiency， durability， and longevity. The brand prides itself on providing state-of-the-art technology to ensure that our homes remain comfortable throughout the seasons. York central air conditioning systems are user-friendly， highly energy-efficient and feature a range of advanced features that homeowners will love. Here are some of the York central air conditioning codes you need to be aware of:

1. E1 Code: This error code means that there is a communication issue between the indoor and outdoor units of the air conditioning system. To fix this error， the AC unit must be turned off using the main switch， and then switched on again after a few seconds.

2. E2 Code: This indicates that there is an issue with the room temperature sensor in the indoor unit. You should contact a certified technician to inspect and fix the sensor.

3. E3 Code: This error message shows that there is an issue with the outdoor air temperature sensor. To resolve it， switch off the main power， wait for a few seconds， and then switch it back on.

4. E4 Code: This error code means that there is an issue with the airflow in the air conditioning unit. You can resolve this by cleaning or replacing the air filter.

5. E6 Code: This indicates that there is a problem with the refrigerant leakage detection. This is a serious issue， and you should contact a professional technician for inspection and repair.

6. E7 Code: This error code means that the inverter PCB has failed. You should call a professional to replace the inverter PCB.

7. E8 Code: This shows that the compressor oil temperature is too high. To resolve this， switch off the unit and let it cool down for about an hour before switching it back on again.

In conclusion， always remember to check your York central AC system regularly for any error codes. If you encounter any unusual codes that you don't understand， don't hesitate to contact a professional technician to inspect and fix the issue.