Why Your AC Can't Keep Up With the Texas Heat
Deza Rae • June 19, 2026

Why Your AC Can't Keep Up With the Texas Heat

Is your air conditioner not cooling properly in Plano, Collin County, TX? If you feel uncomfortably warm even when your air conditioner is running a cooling cycle, it’s important to explore the common causes. Here’s a look at some of the most likely reasons your AC may be struggling to keep up with the Texas heat.


There’s More Heat Than the Equipment Can Handle

There comes a point when the outdoor temperature rises so high that your cooling system can’t keep up. Typically, temperatures over 95 degrees cause these cooling problems.


When this happens, your AC may only be able to maintain a 20-degree difference between the indoor and outdoor temperatures. Try covering your windows and using ceiling fans to spread the cool air.


The Air Filter Needs More Frequent Changes

Is your air conditioner not cooling properly in Collin County, TX, even when temperatures outside are lower? Check your air filter. A clogged air filter blocks airflow and reduces the air conditioner’s efficiency. It can also increase the rate of wear and tear, which leads to a weaker cooling process.


Change your air filter every 30 days. If it seems your filter is always dirty, try changing it more frequently.


Your Coils Need Cleaning

During your annual AC tune-up, the HVAC technician will clean the evaporator and condenser coils. This is an important part of maintenance, since debris and dirt can clog the coils and interfere with the transfer of heat. If you live in a dusty area or you continue running the AC in the fall, you might need additional coil cleaning services.


The Ductwork Has Defects

It’s easy to forget about duct maintenance, but scheduling professional duct cleaning every three years is essential. In addition to removing contaminants from inside the ducts, the technician will look for corrosion, loose connections, and other defects. Without prompt repairs, these flaws in the ducts can let treated air escape before it reaches your living spaces.


Air Conditioner Not Cooling Properly in Collin County, TX? Call the Pros

At AirMax Air Conditioning & Heating, we can accurately diagnose any issues with your system and offer repairs or replacement right away. You can also take advantage of our maintenance services to keep your system running at its best all year long. Contact us to schedule service today.

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