How to Check if Your AC System is Working Properly


As we get closer and closer to the dreadful triple digits of the North Texas summer, do you ever find yourself feeling a bit hot in your own house? Worried your air conditioning unit might not be functioning properly? Believe it or not, there are actually a few easy and painless steps can take to check the HVAC system yourself.

An HVAC system is designed to change the temperature of the air it pulls from inside your home by 20 degrees after its gone through your system and is conditioned.

First, check the temperature in your home by looking at your thermostat – then, use a
thermometer to check the temperature of the air coming out of your vents (Tip: You can use a cooking thermometer).  The conditioned air should be 20 degrees cooler than the air going into your return air vents.

Example: If your thermostat reads that the air temperature going into return is 78 degrees, the air from your vents should be approximately 58 degrees.

An energy efficient, well-maintained home should have the air being dispelled from the vents be 18 to 20 degrees cooler than the air currently in the house.

In the event the inside air is less than 18 degree colder than the air in the house, your system is running longer and using more electricity than it should. This could be due to several different issues:

  • Poorly maintained system
  • Improperly sealed system (leaky duct work pulls in hot attic air)
  • Poorly charged system (refrigerant charge)
  • Dirty outside condenser
  • Coil in attic or closet is in need of cleaning

Call us today for a 29 Point Inspection of your AC system for only $49.00
Call – 972-235-2600 or schedule your inspection on-line at EHSHVAC.COM.


Scroll to Top
Energy Savings Calculator