5 Common Reasons Your Air Conditioner Isn’t Cooling Properly When the temperature outside steadily rises, we rely on our trusty air conditioner to keep us cool. However, there are times when the air conditioning unit just doesn’t do its job quite as well. It’s during these times that knowing how to troubleshoot your AC unit can save your day. Of course, major air conditioner repair is still best left to the professionals. On the other hand, you shouldn’t feel helpless when your air conditioner acts upon you. Here are some ways on how you can bring your AC unit back to its former glory: Issues that might require air conditioner repair Incorrectly set thermostat – a lot of people still don’t know that the thermostat is a key component that determines the efficiency of the air conditioner.