Samsung Air Conditioner Error Code E107

The E107 error code on a Samsung air conditioner indicates that the evaporator outlet (EVAP OUT) temperature sensor on the indoor unit has physically separated or detached from the refrigerant pipe it is meant to monitor. This sensor is a thermistor clipped or secured against the evaporator coil outlet pipe, and its job is to relay real-time refrigerant temperature data back to the control board. When the sensor loses contact with the pipe, the readings it sends become inaccurate or erratic, causing the system to flag a fault and often halt normal operation to prevent potential damage from incorrect temperature regulation.

The EVAP OUT sensor plays a critical role in refrigerant cycle management. By monitoring the temperature at the outlet of the evaporator coil, the control board determines how efficiently the refrigerant is absorbing heat and whether conditions such as icing or insufficient refrigerant flow are developing. A detached sensor cannot accurately reflect pipe temperature because it reads ambient air instead of the pipe surface, which typically produces a noticeably higher temperature reading than expected during operation. This discrepancy is what triggers the E107 fault.

The most direct cause of E107 is physical displacement of the sensor from its mounting clip or bracket on the pipe. This can happen due to vibration over time, improper installation during a previous service, or a clip that has become brittle or broken. In some cases, the sensor wire may be routed in a way that pulls the sensor away from the pipe when the unit vibrates during operation. Inspecting the sensor position and re-securing it to the pipe is the first and most important diagnostic step.