Sort your laundry into smaller loads and separate the heavy items from the lighter items. Overloading the dryer or drying everything together can result in the drying cycle not drying your laundry.
Clean the lint filter before each load of laundry. If the filter is clogged with lint, your laundry will not get dry.
Go to check your home's fuse box or circuit breaker box to look for a blown fuse or a tripped breaker. Your LG dryer works on two fuses or circuits, which means the dryer can have power but no heat. Replacing the fuse or resetting the breaker will fix the drying problem.