LG Air Conditioner Error Code E322

E322 indicates a fault with the EVI Out temperature sensor, which monitors refrigerant temperature at the outlet of the Enhanced Vapor Injection circuit. The control board has detected either a short circuit or an open circuit condition on this sensor. The system shuts down to prevent damage until the fault is resolved.

No, the system will typically shut down automatically when E322 is active, which is the correct protective response. Attempting to bypass or ignore the fault risks operating the compressor without proper temperature monitoring, which can lead to compressor damage or refrigerant system faults. Do not continue operation until the sensor fault is diagnosed and corrected.

A power reset may temporarily clear the error display, but if the underlying sensor fault is still present, the E322 code will return once the unit restarts and the control board re-checks the sensor circuit. A reset does not repair a failed sensor, damaged wiring, or a loose connector. The fault must be physically diagnosed and corrected for the code to clear permanently.

A homeowner can start by checking whether the sensor connector is firmly seated on the control board, which requires accessing the indoor or outdoor unit depending on the system configuration. Measuring sensor resistance requires a multimeter and some technical knowledge. Replacing the sensor or PCB involves refrigerant-side components in some cases and is best handled by a certified technician.

Repair costs vary depending on the root cause. If only the connector needs reseating, the cost may be limited to a service call fee, typically in the range of $75 to $150. Sensor replacement parts generally range from $20 to $80, plus labor. PCB replacement, if required, can range from $200 to $600 or more depending on the unit model.