Samsung Air Conditioner Error Code E113

E113 indicates an open or short circuit error in the MCU temperature sensor, which monitors the internal temperature of the main control board. The unit's diagnostics have detected that the sensor signal is either missing (open circuit) or collapsed (short circuit). This fault causes the system to stop normal operation to protect the electronics. A resistance check at the sensor connector is the first step to confirm whether the sensor itself has failed.

You should not continue running the unit while E113 is active. The MCU temperature sensor protects the control board from overheating, and operating without a functioning sensor removes that protection. Prolonged operation under this condition could result in damage to the PCB or other electronic components. Address the fault before resuming normal use.

A power reset may temporarily clear the error display, but the code will return if the underlying sensor fault is still present. Because E113 is triggered by a measurable electrical condition (open or short circuit in the sensor), the fault will be detected again as soon as the system runs its diagnostics. A permanent resolution requires inspecting, testing, and if necessary replacing the MCU temperature sensor or addressing any wiring issues.

A knowledgeable DIYer can begin by checking the sensor connector for loose connections or visible corrosion, which sometimes resolves the issue without replacing parts. If the connector appears intact, measuring resistance across the two sensor terminals with a multimeter will tell you whether the sensor has failed. Replacing the MCU temperature sensor is a relatively straightforward repair if you are comfortable working with PCB connectors and low-voltage components. If the PCB itself is damaged, professional repair or board replacement is recommended.

If only the MCU temperature sensor needs replacement, parts and labor typically range from around $75 to $200 depending on the unit model and local labor rates. If the main PCB is damaged and requires replacement, costs can range from $150 to $500 or more. Diagnosing the fault accurately before ordering parts will help avoid unnecessary expenses.