Your outdoor condensing unit should also be cared for as well. Keeping leaves, twigs, and acorns from getting into and surrounding the unit is helpful, and covering your unit top will assist with this. Avoid encasing the unit in any material that is not breathable. Remember, trapping moisture in the unit will accelerate component damage (and allow critters to find a home for the winter). Please call a qualified servicing company if you need any assistance with this.