Samsung Air Conditioner Error Code E233

E233 indicates a breakaway fault for the compressor discharge temperature sensor on the fixed speed compressor number 2 in the main outdoor unit. The control board is receiving no valid signal from this sensor, which monitors refrigerant temperature leaving the compressor. This is typically caused by the sensor pulling loose from its mounting holder, a disconnected wiring connector, or a failed sensor. The system flags this fault to prevent compressor operation without proper temperature monitoring.

Running the system while E233 is active is not recommended. The discharge temperature sensor protects the compressor from overheating by allowing the control board to monitor operating conditions. Without a valid sensor reading, the compressor could operate outside safe temperature limits, potentially leading to compressor damage. It is best to leave the system off until the sensor issue is resolved.

If the repair only requires reseating the sensor in its holder or reconnecting a loose wiring connector, the cost may be limited to a basic diagnostic service call fee, typically in the range of $75 to $150. If the discharge temperature sensor needs replacement, parts and labor combined generally run between $100 and $300 depending on the specific unit and local labor rates. Control board replacement, if required, can cost significantly more, often in the $300 to $700 range.

Start by powering down the outdoor unit and inspecting the discharge temperature sensor and its holder on compressor number 2 to confirm the sensor is firmly attached and making contact with the discharge line. Also check the sensor's wiring connector for a secure fit. If the sensor is properly seated and connections are tight but the error returns, the sensor itself likely needs to be tested and possibly replaced. A qualified technician should handle refrigerant-side inspections and control board diagnostics.

A power reset may temporarily clear the error code, but if the underlying cause, such as a detached sensor or a failed sensor, has not been corrected, the fault will return once the unit restarts and attempts to read the sensor. A reset is useful for confirming whether a fault is intermittent, but it is not a fix. The sensor circuit needs to be inspected and repaired to permanently clear E233.