How to Prepare Your Home and HVAC System for a North Texas Heat Wave

Bill Grote

Jun 18 2026 15:00

North Texas heat waves can put serious strain on your air conditioning system—especially when temperatures stay above 100° for days at a time. Getting your home and HVAC system ready early helps improve efficiency, protects your equipment, and keeps your family comfortable during extreme heat. As a trusted local HVAC company in Lewisville, TX, we know exactly what your system needs to handle our tough summer weather.

Below are practical steps to boost airflow, reduce indoor heat, and prepare your AC for the next North Texas heat wave.

Replace HVAC Filters to Improve Airflow

Proper airflow is essential for keeping your home cool during a heat wave. When filters are clogged, your system must work harder—and in our Texas summers, that can quickly lead to breakdowns.

Changing disposable filters or rinsing reusable ones helps:

  • Maintain strong, consistent airflow
  • Keep indoor temperatures more stable
  • Reduce strain on motors and cooling components
  • Improve overall energy efficiency

Clean filters help your AC breathe and keep up with rising outdoor temperatures—especially during peak heat here in Lewisville, Flower Mound, and the North Dallas suburbs.

Clear the Area Around Your Outdoor AC Unit

Your outdoor condenser needs plenty of space to release heat. When it’s blocked by grass, shrubs, or stored items, your AC can’t cool effectively—something you’ll definitely notice in a Texas heat wave.

For the best performance, make sure your condenser has:

  • 2–3 feet of open space on all sides
  • Several feet of clearance above the unit
  • No branches, yard debris, or items touching the equipment

Even small obstructions can reduce efficiency. Clearing the area helps your system shed heat more effectively when temperatures soar.

Use Smart Thermostat Habits

Setting your thermostat dramatically lower won’t cool your home faster—it only makes the system run longer. With Lewisville’s extended stretches of triple-digit temperatures, steady thermostat settings are key.

Helpful habits include:

  • Avoiding sudden temperature drops
  • Keeping your preferred setting consistent
  • Using programmable or smart schedules

Consistency helps your AC run at maximum efficiency during severe summer heat.

What to Do During a Heat Wave

Once a heat wave hits, simple indoor adjustments can reduce strain on your air conditioner.

Minimize Indoor Heat Gain

Sunlight streaming through windows can quickly warm your home. Close blinds, curtains, or shades during the hottest hours to keep indoor temperatures down.

Use Ceiling Fans for Better Air Circulation

Fans don’t lower the temperature, but they move air more effectively and help distribute cooled air from your HVAC system. This improves indoor comfort and eases the load on your AC.

Limit Heat-Producing Activities

Running the oven, dryer, or other heat-generating appliances will raise indoor temps. During extreme heat, try to cook or do laundry early in the morning or late in the evening.

Keep Interior Doors Open

Open doors help air move freely throughout your home. Better circulation prevents hot spots and helps your AC cool more evenly.

Schedule Preventive HVAC Maintenance

Professional HVAC maintenance is one of the most important steps for preparing your system for a Texas summer. While homeowners can replace filters and clear debris, a technician can identify deeper issues before they lead to mid‑summer breakdowns.

During a tune-up, technicians typically:

  • Check refrigerant levels
  • Inspect wiring and electrical components
  • Clean condenser coils
  • Verify airflow and system performance
  • Test controls and safety features

Ahead-of-time service helps prevent unexpected failures when demand on your system is highest.

Seal Air Leaks to Improve Cooling Efficiency

Your AC performs best when your home can hold onto the cool air it produces. Air leaks around windows, doors, and attic access points can let hot outdoor air creep in—especially in Lewisville’s intense summer heat.

Sealing leaks can:

  • Improve indoor comfort
  • Lower energy usage
  • Reduce cooling demand on your AC
  • Help maintain more consistent temperatures

Why Heat Wave Preparation Matters

Extreme heat forces your AC to run longer and harder, increasing wear on key components. Preparing early helps reduce risk of breakdowns, improve efficiency, and keep your home comfortable through North Texas’s hottest stretches.

Be Ready Before Temperatures Spike

Heat waves can come with little warning. Replacing filters, clearing your outdoor unit, and setting your thermostat wisely can go a long way. For even more peace of mind, scheduling preventive HVAC maintenance ensures your system can handle heavy summer use.

If you need help getting your home ready for a heat wave, Select Air Conditioning & Heating is here for you. As a trusted, family‑owned HVAC company in Lewisville, TX, we’re ready to help keep your home cool, efficient, and comfortable all summer long.

Contact us today to schedule your AC service and stay ahead of the next heat wave.