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Error code reference

Samsung Air Conditioner Error Code 322

EVI OUT temperature sensor error (Open/Short)

Samsung codesSamsung air conditioner codes

EVI OUT temperature sensor error (Open/Short) - connector dislocation, wire breaking, or defective sensor.

First step from the service manual

Check if EVI OUT sensor is broken; check EVI OUT sensor connection circuit and sensor.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What 322 means on a Samsung air conditioner

Samsung air conditioner error code 322 indicates a fault with the EVI OUT temperature sensor. EVI stands for Enhanced Vapor Injection, a refrigerant circuit component used in heat pump systems to improve efficiency at low ambient temperatures. The EVI OUT sensor monitors the refrigerant temperature at the outlet of the EVI circuit. When the control board detects a reading outside of the expected resistance range, either too high (open circuit) or too low (short circuit), it triggers error code 322 and disables normal operation to prevent potential system damage.

The three primary causes of this fault are connector dislocation, wire damage, and a defective sensor itself. A disconnected or loosely seated connector at the sensor harness is the most frequent trigger, as vibration over time can work a plug free from its socket. Wire breaks can result from chafing against cabinet edges or pinching during service work. A sensor that has failed internally will produce an out-of-range resistance reading even when the wiring and connector are intact.

Diagnosis begins with a physical inspection of the EVI OUT sensor connector and the wiring harness leading to it. Check for corrosion, bent pins, or a plug that is not fully seated. If the connector is secure, measure the sensor resistance with a multimeter and compare the reading against the temperature-resistance table for the sensor. A reading that shows infinite resistance confirms an open circuit, while near-zero resistance confirms a short. Either condition requires sensor replacement.

Source: manufacturer service documentation.

Common causes of 322

  1. 01

    Loose or disconnected sensor connector

    Wiring / connection

    The connector plug on the EVI OUT sensor harness can work loose due to vibration over time. Inspect the connector for a fully seated and locked connection at both the sensor end and the control board end.

  2. 02

    Defective EVI OUT temperature sensor

    Part replacement

    The sensor itself may have failed internally, producing an open or short circuit condition. Measure the sensor resistance with a multimeter; a reading of infinite or near-zero resistance at a known ambient temperature confirms sensor failure.

  3. 03

    Broken or damaged sensor wire

    Part replacement

    The wiring between the sensor and the control board may be broken due to chafing, pinching, or stress from previous service work. Inspect the full length of the harness for cuts, exposed conductors, or sharp bends that could indicate a break.

  4. 04

    Corroded or damaged connector pins

    Part replacement

    Moisture intrusion into the connector housing can cause pin corrosion, increasing resistance to the point where the control board reads an open circuit. Check the pins visually and clean or replace the connector if corrosion is present.

See the test procedure for each cause

Frequently asked questions about 322

What does 322 mean on a Samsung air conditioner?
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.
Can I fix Samsung error code 322 myself?
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.
Will resetting the unit clear error code 322?
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.
Is it safe to run my Samsung air conditioner while error code 322 is active?
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.
How much does it cost to repair Samsung error code 322?
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.

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