Troubleshoot an LG air conditioner by checking for common problems such as power supply problems, fan issues and dirty condenser coils. By checking for these issues initially, problems that are more complex can hopefully be detected and fixed.
If the LG air conditioner is not working, first check to make sure that the power cord is plugged into a working electrical outlet. Open the breaker box or the household fuse, and check for tripped circuit breakers or blown-off fuses. Reset tripped circuit breakers, and replace blown fuses with new ones.
If the air conditioner is not cold enough, the condenser coils or air filters may be dirty. Open the grille on the AC unit and remove the air filter. Clean out or replace the air filter as needed. If the problem continues, examine the condenser coil to see if it is dirty. A dirty condenser coil prevents the unit from dissipating heat that was removed from the air. Consider cleaning it out to enhance the efficiency of the air conditioner.
If the air conditioner’s fan is not working, the drive motor or fan motor may be defective. If the speed of the fan does not change from high to low, replace the fan motor. Check if the fan blades are hitting the shroud or blower wheel. Use mounting screws to shim the bottom of the fan motor if the blades are hitting the base.