Samsung Air Conditioner Error Code E322

E322 indicates an error with the EVI OUT temperature sensor in the outdoor unit. The fault can be caused by a disconnected sensor connector, a broken wire in the sensor harness, or a failed sensor. The outdoor PCB cannot read a valid temperature signal from this sensor, which triggers the error and may limit system operation.

Operating the system while E322 is active is not recommended. The EVI OUT sensor provides temperature data the controller uses to protect and regulate the refrigerant circuit. Without a reliable signal from this sensor, the system may not respond correctly to abnormal operating conditions, which could lead to compressor or refrigerant circuit damage over time.

Repair costs depend on the specific cause. If only a connector needs reseating, you may only pay a diagnostic or service call fee, typically in the range of $75 to $150. If the sensor itself needs replacement, parts and labor combined generally fall in the range of $100 to $300 depending on the unit model and local labor rates. A broken wire harness repair falls somewhere in a similar range depending on accessibility and labor time.

If the cause is simply a dislodged connector, a confident DIYer can open the outdoor unit cabinet, locate the EVI OUT sensor connector on the PCB, reseat it firmly, and clear the code. However, if the wire harness is broken or the sensor itself has failed, the repair involves component replacement and working around refrigerant circuit components, which is best handled by a qualified technician.

A power reset may temporarily clear the error display, but if the underlying fault such as a disconnected connector, broken wire, or failed sensor is still present, the E322 code will return once the unit attempts to read the sensor again. The physical cause must be identified and corrected before the error will stay cleared.