Samsung Air Conditioner Error Code E413

E413 indicates that the SUMP sensor has activated a protective control operation due to detected or potential refrigerant inflow into the compressor sump. The system shuts down to prevent compressor damage from liquid refrigerant entering a section of the compressor that should only contain refrigerant vapor and oil. This is a safety protection function, not simply a sensor fault.

A power reset may temporarily clear the E413 code and allow the unit to restart, but if the underlying problem persists, the error will return. If the issue is actual refrigerant flooding back into the compressor, repeated resets and restarts can cause progressive mechanical damage. It is important to diagnose and correct the root cause before relying on the unit for continued operation.

Repair costs vary widely depending on the root cause. If the fix is simply repositioning the SUMP sensor or reseating its connector, costs may be limited to a service call fee, typically in the range of $75 to $150. If the sensor itself needs replacement or the refrigerant system requires recharging or an expansion valve replacement, costs can range from $150 to $600 or more. In the worst case where the compressor has already been damaged by refrigerant inflow, replacement costs can be significantly higher.

Start by checking that the SUMP sensor is mounted correctly on the compressor and that its wiring connector is fully attached and free of damage. If the sensor and connection are in good condition, the refrigerant system itself should be evaluated by a certified HVAC technician who can check operating pressures and inspect the expansion valve. Simply clearing the error without addressing the underlying cause risks serious compressor damage.

No, you should not continue running the unit while the E413 error is active. The protective control is designed to prevent catastrophic compressor damage from liquid refrigerant ingestion. Operating the compressor under these conditions can lead to complete compressor failure, which is a much more costly repair than addressing the original fault.