Samsung Air Conditioner Error Code E223

E223 indicates an open or short circuit fault in the outdoor condenser mid-point temperature sensor (COND MID sensor). The control board is receiving a signal from that sensor that is either missing entirely or outside the acceptable range. The unit will typically stop operating normally until the fault is resolved. The issue can originate at the connector, the sensor itself, or the wiring harness.

It is not recommended to continue operating the unit while E223 is active. The COND MID sensor provides temperature data that the control board uses to protect the condenser and compressor from overheating. Without reliable readings from this sensor, the system cannot make informed decisions about protecting those components, which could lead to compressor damage over time.

Repair costs vary depending on the root cause. If only the connector needs to be reseated, there may be no parts cost, though a service call fee typically applies and can range from $75 to $150 or more. Replacing the COND MID thermistor sensor usually involves parts costs in the range of $20 to $80 for the sensor itself, plus labor. If the outdoor PCB requires replacement, total costs can rise significantly higher, often ranging from $300 to $600 or more depending on the model.

If the sensor connector has simply come loose from the outdoor PCB, you can reconnect it yourself after powering the unit off at the breaker. However, if the sensor has failed or the wiring is damaged, a technician with a multimeter and access to the correct replacement sensor will be needed. Working inside the outdoor unit involves live voltage risks, so any work beyond reconnecting an obviously loose plug should be left to a qualified technician.

A reset may temporarily clear the error code, but if the underlying fault with the sensor or wiring is still present, the E223 code will return once the unit restarts and re-checks the sensor signal. A reset is useful only as a first step after physically reconnecting a loose sensor connector. If the code comes back after a reset, a full diagnostic of the sensor and harness is required.