Samsung Air Conditioner Error Code E233

Error code E233 on a Samsung air conditioner indicates a breakaway fault with the compressor discharge temperature sensor on the fixed speed compressor number 2 in the main outdoor unit. The discharge temperature sensor monitors the temperature of refrigerant gas as it exits the compressor at high pressure. This is a critical safety and efficiency measurement point, because excessively high discharge temperatures can indicate refrigerant undercharge, poor compression, or restricted airflow, and can lead to compressor damage if left unaddressed. A "breakaway" fault specifically means the control board is detecting an open or interrupted signal from this sensor, rather than a reading that is simply out of range.

The most likely cause of an E233 fault is a physical disconnection of the sensor from its mounting holder or from the wiring harness. Samsung discharge temperature sensors are seated in clip-style holders attached to the compressor discharge line. If the sensor pulls free from the holder, the contact with the pipe is lost and the temperature reading becomes unreliable or absent entirely. This is why the first diagnostic step is to verify that the sensor probe and its holder are correctly attached and making firm contact with the discharge line.

Beyond a simple detachment, the sensor itself may have failed internally, producing an open circuit condition. Wiring damage between the sensor and the outdoor unit control board, including corroded connector pins or chafed wire insulation, can also produce this fault. Technicians should inspect the full sensor circuit after confirming physical attachment, checking wiring continuity and connector integrity before concluding the sensor requires replacement.