Quick Way To Check if AC is Cooling Correctly:
You can measure if your air conditioner is working the way it’s supposed to by comparing the temperature of the air blowing out of the vent to the temperature of the air going back into the return air vent. There should be 15 to 18 degrees (F) difference between the two temperatures. A higher difference might indicate an issue such as a clogged air filter. A lower difference could mean a problem like your AC is low on Freon. Either way, it’s using a lot of extra electricity when it’s not running efficiently, and it’s time for maintenance.