Samsung Air Conditioner Error Code 413

Error code 413 on a Samsung air conditioner indicates that the unit has entered protection mode based on a reading from the SUMP sensor, which monitors the compressor for liquid refrigerant inflow. The system shuts down to prevent liquid slugging damage to the compressor. The fault points to either an actual refrigerant inflow condition or a problem with the SUMP sensor itself, including its mounting position or connector.

No. The 413 protection control is designed specifically to prevent the compressor from operating under conditions that could cause severe internal damage from liquid refrigerant. Running the unit while this error is active risks compressor failure, which is one of the most costly repairs possible on an air conditioning system. The unit should remain off until the underlying cause is diagnosed and resolved.

Repair costs vary significantly depending on the root cause. If the issue is simply a mispositioned or disconnected SUMP sensor, costs may be limited to a service call fee, typically in the range of $75 to $150. A faulty sensor requiring replacement may add $50 to $200 in parts and labor. If refrigerant overcharge or inflow issues are found, adding refrigerant adjustment or further diagnostic work can bring total costs to $150 to $400 or more. Compressor replacement, if damage has already occurred, is substantially more expensive.

Some aspects of diagnosing a 413 error are accessible to a knowledgeable DIYer, such as checking whether the SUMP sensor connector is securely attached and inspecting the sensor's mounting position on the compressor. However, any work involving refrigerant pressures, refrigerant charge levels, or compressor component replacement requires a certified HVAC technician. Attempting to handle refrigerants without proper certification and equipment is both illegal and unsafe.

A power reset may temporarily clear the displayed error, but if the underlying condition, whether a refrigerant inflow problem or a faulty sensor, has not been corrected, the error will return once the unit attempts to operate again. Resetting without diagnosis does not address the root cause and can delay necessary repairs.