Samsung Air Conditioner Error Code *6

The *6 code indicates an outdoor unit thermistor sensor error detected by the wired remote controller. The number or letter replacing the asterisk identifies the specific indoor unit address reporting the fault. The outdoor thermistor monitors temperature to help the system control the compressor and defrost cycles, and this code means the control board is receiving an abnormal or absent signal from that sensor.

Operating the system with an active *6 error is not recommended. The outdoor thermistor provides critical temperature data used to protect the compressor and manage defrost cycles. Running the unit without accurate sensor input can lead to improper operation or potential compressor damage over time.

If the fix is simply reseating the connector at CN41, there may be no parts cost involved, though a service call fee typically applies. Replacing the outdoor thermistor sensor generally costs between $50 and $150 for the part, plus labor. If the outdoor control board requires replacement, total repair costs can range from $200 to $500 or more depending on the model and labor rates in your area.

Start by checking whether the outdoor unit thermistor is properly connected at the CN41 connector on the outdoor control board. If the connector is secure, test the thermistor with a multimeter to see if its resistance is within the expected range for the current outdoor temperature. If the thermistor is out of range or reads open or shorted, it will need to be replaced. Also inspect the wiring between the thermistor and the board for any damage.

A power reset may temporarily clear the error display, but the code will return if the underlying sensor issue has not been resolved. The fault is tied to an actual hardware condition, either a disconnected connector, a failed thermistor, or damaged wiring, so the root cause must be corrected for the error to clear permanently.