If your air conditioner isn’t blowing cold or maybe you don’t think it’s performing well, it’s important to ask yourself “how cold should it blow?”.

To make it quick, your air conditioner should blow about 18 degrees less at the supply vents from the return vents where your filters are, depending on conditions of the environment.

This measurement can be taken with a temperature gun (if you have one handy) at home before calling an HVAC company out by taking temperature readings at the supply and return air ducts. A lot of HVAC professionals like to take the return air reading at the air handler. It’s known as the temperature split or “delta t” by HVAC professionals and can help diagnose possible problems with your air conditioners cooling.

When your unit’s temperature split (delta t) is less than ideal it can mean that there is a problem with your unit and can be a sign of low Freon or poor air flow. Once the technician identifies that there is not an ideal temperature split he can move forward and identify what the problem truly is. Before calling anyone out make sure your filters have been changed and that they are not dirty. If that doesn’t do the trick then it’s time to call an HVAC company like us because that means your unit needs to be looked at by a professional so they can tell you what you can do to fix the problem.