Why does my AC stop working when it gets hot?
Why does my AC stop working when it gets hot? Low Airflow Instead, the home gets hotter and hotter, and the refrigerant in the coil (which has no heat to absorb) won't warm up. As a result, the coil will get colder and colder, expanding every time your AC cycles, and it will eventually freeze up and stop working. At what temperature should you stop running your AC? What Temperature is Too Cold for Air Conditioners? HVAC manufacturers usually recommend that users do not operate their units for prolonged periods of time if the temperature is lower than 65 degrees...