How to Help Your AC Survive a Texas Heat Wave

When extreme temperatures settle over Frisco and the Dallas–Fort Worth area, your air conditioner is no longer handling an ordinary summer day. It may run for long stretches while fighting intense outdoor heat, scorching attic temperatures and heat entering through windows, doors and poorly insulated areas of your home.

During a Texas heat wave, small HVAC problems can quickly become major comfort concerns. A clogged filter, dirty coil or worn electrical component that went unnoticed during milder weather may cause your system to struggle when demand reaches its highest point.

A few simple steps can reduce unnecessary strain, improve indoor comfort and help you recognize a developing problem before your AC stops working completely.

Is It Normal for an AC to Run Constantly During Extreme Heat?

Longer cooling cycles are common during a Texas heat wave. Your air conditioner must remove heat from your home while new heat continually enters from outside. The hotter it becomes, the harder and longer the system may need to operate.

That does not mean every constantly running AC is operating normally. Your system may need professional attention if it runs continuously while:

• The indoor temperature continues to rise

• Little or no air comes from the vents

• The cents are blowing warm air

• Certain rooms remain significantly hotter than others

• The system repeatedly starts and stops

• You hear grinding, buzzing, rattling, or squealing

• Ice develops on the equipment

• Water collects around the indoor unit

• You notice a burning or electrical odor

These symptoms can indicate restricted airflow, dirty coils, an electrical problem, low refrigerant, or another issue that may worsen under extreme demand.

1. Avoid Making Large Thermostat Adjustments

Turning the thermostat down dramatically will not make your air conditioner cool the house faster. It only asks the system to keep running longer.

Choose a temperature that keeps your household safe and reasonably comfortable, then avoid repeatedly changing the setting. If you home is already warmer than normal, lowering the thermostat several more degrees can place additional demand on a system that is already working hard.

2. Check Your Air Filter

A clogged air filter restricts the airflow your system needs to cool your home. During a heat wave, that restriction can make an already stressed air conditioner work even harder.

Inspect the filter and replace it if it appears covered in dust or debris. Homes with pets, recent remodeling work, or unusually heavy AC use may require more frequent filter changes.

Use the filter type and size recommended for your equipment. A filter with a higher rating is not automatically better if it restricts more airflow than the system was designed to handle.

3. Keep Afternoon Heat Out

Reducing the amount of heat entering your home gives your air conditioner less work to do.
During the hottest part of the day:

• Close the blinds and curtains on sun-facing windows

• Keep exterior doors closed

• Avoid using the oven

• Run heat-producing appliances later in the evening

• Turn off unnecessary lights and electronics

• Use ceiling fans in occupied rooms

• Make sure windows are completely closed and locked

Ceiling fans do not lower the room's actual temperature, but moving air can help people feel more comfortable. Turn fans off when nobody is in the room to avoid wasting electricity.

4. Give the Outdoor AC Unit Room to Breathe

Your outdoor condenser releases heat collected from inside your home. Grass, leaves, weeds, and other debris can restrict airflow and reduce cooling performance.

Check the area around the unit and carefully remove loose debris. Keep plants, lawn equipment, and stored objects away from the equipment.

Do not open electrical panels, bend the coil fins, or attempt internal repairs. If the coil appears heavily blocked or damaged, arrange for professional service.

Keep Vents and Return Grilles Open

Closing vents in unused rooms may sound like an easy way to direct cool air elsewhere, but it can disrupt the airflow and pressure your HVAC system was designed to maintain.

Keep supply vents open and make sure furniture, rugs, curtains, and boxes are not blocking them. Return-air grilles also need open space so air can circulate back through the system.

If one area of your house consistently receives weak airflow, the cause may involve duct leakage, a blocked duct, improper system balancing, or another issue that should be inspected.

6. Don't Ignore a Rising Indoor Temperature

Your home may feel somewhat warmer during the hottest afternoon hours, especially during a prolonged period of extreme heat. However, the indoor temperature should not continue climbing without limit.

Check that:

• The thermostat is set to cool

• The fan is set to AUTO

• The air filter is not clogged

• The indoor and outdoor units appear to be operating

• The vents are open and producing cool air.

If the AC is running but the indoor temperature keeps rising—or the vents are blowing warm air—the system may require professional diagnosis.

7. Address Problems Before They Become Breakdowns

Extreme heat exposes weaknesses that may not be noticeable during milder weather. A worn capacitor, dirty coil, struggling motor, or refrigerant problem can become much more serious when the system must run for hours at a time.

Prompt service may help prevent further damage and a complete loss of cooling. This is particularly important if your household includes older adults, young children, pets, or anyone with a health condition that makes extreme heat more dangerous.

What Should You Do If Your AC Stops Working?

If you air conditioner shuts down during a Texas heat wave:

• Confirm that the thermostat has power and is set correctly

• Check the air filter

• Check the HVAC breaker once

• Look for visible water or ice around the equipment

• Close the blinds and curtains

• Limit oven and appliance use

• Move the household members to a cooler location if conditions become unsafe

• Call for professional AC service

Do not repeatedly reset a tripped breaker. A breaker that trips again may indicate an electrical or mechanical problem that requires a qualified technician.

Never attempt to open electrical components, handle refrigerant, or bypass a system safety control.

What Should You Do If Your AC Stops Working?

A loss of air conditioning during a North Texas heat wave is more than an inconvenience. Extreme heat can quickly become more dangerous.

Stay hydrated, limit strenuous outdoor activity, and check on relatives and neighbors. Know the symptoms of heat exhaustion and heatstroke. If someone shows signs of heatstroke, move them to a cooler location and call 911 immediately.

Residents who need help locating a cooling center can contact 2-1-1 Texas.

Get 24/7 AC Repair in Frisco

When your AC cannot keep up with the Texas heat, waiting can allow the problem—and the temperature inside your home—to get worse.

One Hour Heating & Air Conditioning of Frisco provides air conditioning repair, maintenance, and replacement throughout Frisco and the surround Dallas-Forth Worth area. Our technicians service all major system brands, provide upfront pricing, and are available 24 hours a day, seven days a week.

If your AC is blowing warm air, making unusual noises or failing to keep your home safe and comfortable, call 945-215-0627 or schedule service online.