Goldstar is part of the Korean company LG, formed when they merged with another Korean company called Lucky to form Lucky Goldstar. While the Goldstar name still sells some air conditioners, they are actually produced by LG. Like all room air conditioners, the Goldstar air conditioners have a filter that must be cleaned regularly for the unit to work efficiently.
Turn off the Goldstar air conditioner unit, and unplug it from the power source.
Open the fan vent on the front of the Goldstar unit. Pull out the air filters.
Wet a cloth with warm water and 1 tsp. dish soap to create suds. Scrub the air filter with the soapy cloth to remove any dust and dirt.
Rinse the air filter in warm water until it runs clean.
Allow the air filter to air dry, and replace it in the Goldstar air conditioning unit.