Could it be low on refrigerant?
LG air conditioners don't provide cool air from thin air. Instead, these electrical appliances use a refrigerant that resides in the coils. However, the AC unit can't use all the cooling fluid, so the likely issue is leakage. The AC coil can crack, which causes the refrigerant to spill. It isn't much you can do to manage the situation other than to call a technician to check the cause of the leak.