If you’ve lived in Dallas-Fort Worth for even one summer, you already know what’s coming. Triple-digit heat that doesn’t let up from June through September, electric bills that make your eyes water, and the absolute worst timing for your AC to quit on you — usually on the hottest Saturday of the year.
We’ve been servicing HVAC systems across the DFW Metroplex for years, and every single summer we get the same rush of emergency calls from homeowners who could have avoided the breakdown entirely with a little prep work in the spring. Here’s what we tell every customer who asks us how to get ready.
01 Change Your Air Filter — Seriously, Do It Right Now
This is the number one thing we see neglected on service calls. A clogged filter forces your system to work harder, drives up your electric bill, and can freeze your evaporator coil. During peak summer in DFW, you should be swapping your filter every 30 days if you’re running a standard 1-inch filter. If you have pets, allergies, or a house full of kids, consider upgrading to a MERV 11 or higher and checking it every three weeks.
02 Walk Outside and Look at Your Condenser
Your outdoor unit needs at least two feet of clearance on all sides to breathe properly. After spring storms roll through North Texas, we regularly find condensers buried in leaves, mulch, fence debris, and cottonwood fluff. Grab a garden hose and gently spray the coils from the inside out to remove buildup. Never use a pressure washer — that will flatten the fins and restrict airflow.
03 Test Your System Before You Need It
Don’t wait until the first 95-degree day to turn on your AC. Run it now while it’s still mild outside. Set the thermostat 5 degrees below room temperature and let it run for 30 minutes. Listen for unusual noises — grinding, squealing, or clicking. Check that the air coming from your vents is noticeably cold. If something feels off, you want to catch it now when every HVAC company in DFW isn’t booked solid.
04 Check Your Thermostat Batteries and Settings
If your thermostat runs on batteries, replace them. A dead thermostat battery at 2 AM in August is a miserable experience. If you have a programmable or smart thermostat, set your summer schedule now. We recommend 78°F when you’re home and 82–85°F when you’re away. Every degree below 78 adds roughly 3–5% to your cooling costs in the Texas heat.
05 Inspect Your Ductwork for Leaks
In a typical DFW home, 20–30% of the air moving through your ducts can be lost to leaks, holes, and poor connections — especially if your ductwork runs through an unconditioned attic where temperatures can reach 150°F in summer. Look for disconnected joints, visible gaps, or duct tape that’s dried out and peeling. Professional duct sealing can cut your energy bill significantly and make your home noticeably more comfortable.
06 Clear Your Condensate Drain Line
Your AC produces gallons of water as it pulls humidity from the air. That water drains through a PVC line, usually near your outdoor unit or into a utility sink. Over time, algae and buildup can clog this line, causing water to back up into your drain pan and potentially overflow onto your ceiling or floor. Pour a cup of plain white vinegar down the drain line every few months to keep it clear.
07 Check Your Electrical Connections
This one is best left to a professional, but it’s worth knowing about. Loose or corroded electrical connections can cause your system to short cycle, trip breakers, or fail entirely. During a professional tune-up, your technician should check and tighten all connections, test capacitors, and measure amp draws on the compressor and fan motors.
08 Consider Your System’s Age
The average AC system in Texas lasts 12–15 years. If yours is approaching that range, start planning now rather than scrambling during an emergency. As of 2026, new systems use R-32 or R-454B refrigerant instead of the old R-410A, and they’re required to meet higher SEER2 efficiency standards. The upfront cost is higher, but the operating cost savings in a climate like ours can be substantial. Plus, Oncor is offering rebates up to $3,400 for qualifying high-efficiency installations.
09 Seal Your Home’s Envelope
Your AC can only do so much if your house is leaking air everywhere. Check weatherstripping around doors, caulk around windows, and make sure your attic insulation hasn’t settled or been displaced. In DFW’s older neighborhoods — especially homes built in the 1970s through 1990s — we frequently find attic insulation that’s well below current standards. Adding blown-in insulation to your attic is one of the highest-ROI improvements you can make for summer comfort.
10 Schedule Your Professional Tune-Up Now
A professional maintenance visit in the spring catches problems before they become emergencies. Your technician will check refrigerant levels, clean the evaporator and condenser coils, test electrical components, verify thermostat calibration, and inspect the overall health of your system. Think of it like an oil change for your car — it’s cheap insurance against a catastrophic failure in the middle of July.
Don’t Wait Until It Breaks
The DFW summer is not forgiving. A little prevention in April and May saves a lot of sweat — and money — in July and August.
Available 24/7 · Serving All of DFW · Farmers Branch, TX