What would you do if your air conditioner malfunctioned and stopped working midsummer? Sweating indoors and outdoors is not a pleasant thought. However, when ac units cease to function, it’s usually a problem that could have been prevented. Once summer temperatures hit around 105 degrees, the ac unit begins to work harder in order to keep temperatures low. In order for the AC to be able to function under these conditions, AC inspections throughout the year are vital as well as changing or cleaning your filter.