LG Air Conditioner Error Code 13

Error code 13 on an LG air conditioner indicates a PSC fault, meaning the system has detected a problem in the Permanent Split Capacitor circuit. This circuit includes the run capacitor and its connections to the compressor and fan motors. The unit shuts down when this fault is detected to prevent motor damage. A failed run capacitor is the most frequent cause.

No, continuing to operate the unit with a PSC fault is not recommended. A degraded capacitor causes motors to draw excessive current and overheat, which can lead to compressor or fan motor burnout. The unit typically shuts itself down when this code appears specifically to prevent that kind of damage. The fault should be diagnosed and repaired before resuming normal operation.

A power reset may temporarily clear the fault display, but error code 13 will return if the underlying PSC circuit problem has not been corrected. Resetting without repairing the cause leaves the motors vulnerable to continued damage from an undersized or failing capacitor. The error code should be used as a prompt to inspect and test the run capacitor and associated motor circuits rather than simply cleared and ignored.

Replacing a run capacitor is a repair that experienced DIYers can perform, but capacitors store a dangerous electrical charge even after the unit is powered off and must be safely discharged before handling. Identifying whether the fault is caused by the capacitor, a motor winding, or wiring requires a capacitance meter and multimeter. If you are not comfortable working with high-voltage components, a certified HVAC technician should handle the repair.

If the repair only requires a run capacitor replacement, costs typically range from around $75 to $250 depending on the capacitor rating and labor rates in your area. If a fan motor or compressor motor has also failed as a result of the PSC fault, repair costs can range from $200 to $700 or more depending on the component. Getting a diagnostic assessment before authorizing parts replacement is advisable.