It’s August in Central Texas. The sun is blazing, the temperature is pushing toward triple digits, and your air conditioner seems like it hasn’t shut off since breakfast.
At some point, you may start wondering, “Is my AC supposed to be running this much?”
The short answer is that on extremely hot Texas days, long AC cycles can be completely normal. But there is a difference between an air conditioner working hard because of the heat and one running constantly because something is wrong.
If you live in Kyle or the surrounding Central Texas area, here’s how to tell the difference.
Why Your AC Runs Longer When It’s Extremely Hot
Your air conditioner does not simply blow cold air into your home. It removes heat from inside and transfers it outdoors.
The hotter it gets outside, the harder that process becomes.
During a mild 85-degree day, your AC may cool your home fairly quickly and then shut off until the temperature rises again.
When it’s 100 degrees outside, your system has a much bigger job.
It may run for long periods, especially during the hottest part of the afternoon. That does not automatically mean something is wrong.
In fact, a properly sized air conditioner may run for extended periods during extreme heat while still maintaining a comfortable indoor temperature.
So, How Long Should an AC Run?
There isn’t one perfect answer.
AC runtime depends on several factors, including:
- Outdoor temperature
- Thermostat setting
- Size of your home
- AC system size
- Insulation
- Sun exposure
- Indoor humidity
- Condition of your HVAC equipment
On a typical summer day, your system should cycle on and off as needed.
During extreme Texas heat, however, those cooling cycles can become much longer. Your AC may even run almost continuously during the hottest hours of the day.
The more important question is whether your system is actually keeping your home comfortable.
When Constant AC Runtime May Be a Problem
If your AC is running constantly but your home stays reasonably close to the thermostat setting, it may simply be responding to extreme outdoor temperatures.
If it runs all day and your home keeps getting warmer, that’s different.
Here are a few signs that something may need attention.
Your Home Isn’t Reaching the Thermostat Setting
Let’s say your thermostat is set to 74 degrees, but your home reaches 78 or 80 degrees and keeps getting warmer.
That suggests your system may not be keeping up.
There are several possible causes, from restricted airflow to refrigerant problems. A professional inspection can help determine whether the issue is with the equipment or another part of the home.
The Air Coming From Your Vents Isn’t Very Cold
Your AC can run all day without accomplishing much if it isn’t cooling the air properly.
If the air coming from your vents feels warm or only slightly cool, there may be an issue with the refrigeration cycle, coils, airflow, or another system component.
Your Airflow Feels Weak
Put your hand near one of your supply vents.
Does the airflow seem noticeably weaker than usual?
A dirty filter, ductwork issue, blower problem, or frozen coil can reduce airflow and make it much harder for your AC to cool the house.
Your Electric Bill Suddenly Jumps
Summer electricity bills in Texas are going to be higher than spring bills. Your AC is simply running more.
What deserves attention is a major increase that cannot be explained by hotter weather or changes in how you use your home.
If your AC is running constantly because it has lost efficiency, that extra runtime can show up quickly on your electric bill.
Your AC Never Shuts Off, Even at Night
This is another important clue.
An AC system may work extremely hard at 4 p.m. when the outdoor temperature is near its peak.
But temperatures usually begin falling after sunset.
If your system continues running nonstop late into the night and still cannot reach the thermostat setting, there may be more going on than just the Texas heat.
Common Reasons an AC Runs Constantly
If excessive runtime isn’t caused by the weather alone, there are several possible explanations.
Dirty Air Filter
Start with the easy one.
A clogged filter restricts airflow and forces your HVAC system to work harder. During summer, filters can become dirty faster because your AC is operating more frequently.
Check your filter regularly and replace it when needed.
Dirty Outdoor Condenser
Your outdoor AC unit needs airflow to release heat.
Grass clippings, leaves, dirt, and other debris can reduce that airflow and make the system less efficient.
Keep plants and debris away from the condenser so it has room to breathe.
Low Refrigerant
Low refrigerant can reduce your AC’s ability to remove heat from your home.
If there is a refrigerant leak, the system may run for hours while struggling to reach the temperature you’ve set.
Refrigerant problems require professional diagnosis and repair.
Leaky or Damaged Ductwork
Your AC may be producing plenty of cool air, but that doesn’t mean all of it is reaching your rooms.
Leaks in ductwork can allow conditioned air to escape into attics and other unconditioned spaces.
Your system then has to keep running to replace the air you’re losing.
Poor Insulation or Air Leaks
Sometimes the AC isn’t the main problem.
Poor attic insulation, gaps around windows and doors, or other air leaks can allow heat into the home faster than your HVAC system can remove it.
This becomes especially noticeable during the hottest weeks of summer.
An Aging AC System
Air conditioners don’t maintain the same performance forever.
As components wear and efficiency declines, an older system may need to run longer to provide the same amount of cooling.
If your AC is more than 10 to 15 years old, requires frequent repairs, and runs constantly every summer, it may be worth discussing whether repair or replacement makes more sense.
Should You Turn Your Thermostat Lower to Help?
It can be tempting.
Your home is 78 degrees, so you lower the thermostat from 74 to 68 hoping the AC will cool faster.
Unfortunately, that’s not how most residential air conditioners work.
Setting the thermostat lower doesn’t make your AC produce colder air or cool the house faster. It simply tells the system to keep running until it reaches the new setting.
During extreme heat, that may mean even more runtime without making your home noticeably more comfortable.
Instead, choose a reasonable temperature and let the system do its job.
Don’t Ignore Humidity
Temperature is only part of indoor comfort.
High humidity can make your home feel warmer even when the thermostat shows a reasonable temperature.
If your house feels cool but still seems sticky or muggy, indoor humidity may be the bigger problem.
Depending on your home and HVAC system, improved humidity control or a whole-home dehumidifier may help you feel more comfortable without continually lowering the thermostat.
When Should You Call an HVAC Professional?
An AC running for long periods during an August heat wave isn’t automatically cause for concern.
What matters is how the system is performing.
Consider scheduling an inspection if:
- Your home keeps getting warmer while the AC runs
- Your AC rarely shuts off, including at night
- Airflow has become weak
- The air from your vents isn’t cool
- Your electric bill suddenly increases
- You hear unusual noises
- Some rooms are significantly warmer than others
Catching an issue now can help prevent a complete breakdown when your AC is working its hardest.
AC Service for Kyle, TX Homeowners
Your air conditioner has a tough job during a Central Texas summer. Long cooling cycles can be normal when temperatures soar, but constant runtime combined with poor cooling is worth investigating.
At Garner Heating & Air Conditioning, we help homeowners in Kyle and the surrounding communities figure out whether their AC is simply working hard or showing signs of a problem.
If your system has been running nonstop and you’re wondering whether something is wrong, give Garner Heating & Air Conditioning a call. We can inspect your system, explain what we find, and help you determine the best way to keep your home comfortable through the rest of the Texas summer.
