Samsung Air Conditioner Error Code 322

Error code 322 on a Samsung air conditioner indicates a fault with the EVI OUT temperature sensor. The control board has detected an open or short circuit condition at this sensor, which monitors refrigerant temperature in the Enhanced Vapor Injection circuit. The most common causes are a disconnected connector, a broken wire, or a failed sensor. The unit will not operate normally until the fault is resolved.

A power reset may temporarily clear the error display, but the code will return as soon as the control board re-checks the EVI OUT sensor circuit and detects the same open or short condition. A reset does not correct a loose connector, broken wire, or failed sensor. The underlying fault must be identified and repaired for the error to clear permanently.

If the fix is simply reseating a loose connector, there may be no parts cost and only a service call fee, typically in the range of $75 to $150. If the EVI OUT sensor needs replacement, parts and labor combined generally fall in the range of $150 to $350 depending on the model and local labor rates. A wire harness repair will vary based on the extent of the damage.

A homeowner or DIYer with basic electrical skills can safely inspect and reseat the sensor connector, which resolves the error in many cases. Testing sensor resistance with a multimeter requires some technical knowledge but is achievable without specialized tools. However, if the sensor itself needs replacement or the fault is deep within the refrigerant circuit area, a certified HVAC technician should perform the work.

Operating the unit while error code 322 is active is not recommended. The EVI OUT sensor provides temperature data the control system uses to manage the refrigerant circuit safely and efficiently. Running without accurate sensor feedback could lead to improper refrigerant management or compressor stress. The unit should be inspected and the fault corrected before resuming normal use.