How to Lower Your Summer Cooling Bills in Lubbock

Cooling a home through a Lubbock summer is expensive — weeks of 95–105° afternoons keep the AC running for hours, and the electric bill climbs with it. You can't change the weather, but you can change how hard the system works. Everything below aims at one target: fewer minutes of runtime per day.

What thermostat setting saves money in a Lubbock summer?

The thermostat is the biggest lever you control. Every degree you raise the setpoint shortens compressor runtime, so set it as warm as your household can stay comfortable — many energy programs suggest around 78°F when you're home — and let the house drift warmer when it's empty.

• Use ceiling fans, then raise the setting. Moving air feels a few degrees cooler, so a higher setpoint stays comfortable. Fans cool people, not rooms — turn them off when you leave.
• Run the fan on AUTO, not ON. On ON, the blower runs nonstop between cycles and re-evaporates moisture off the coil back into the house.
• Don't crank it low to “cool faster.” An AC cools at one speed — setting 68° instead of 76° just makes it run longer.
• Automate it. A programmable or smart thermostat handles the schedule so the savings happen without anyone remembering.

Why does a dirty filter raise my electric bill?

A clogged filter chokes airflow across the indoor coil, so the blower works harder and the system runs longer to move the same heat. Left long enough, the coil can ice over — cooling drops to almost nothing while the meter keeps spinning. West Texas dust loads filters faster than the packaging suggests: check monthly in summer and swap it when it looks gray. Our guide to filter changes in dusty West Texas covers timing and filter types.

How do I keep the West Texas sun from heating up my house?

Every bit of heat you block is heat the AC never has to remove — and the afternoon sun through west- and south-facing windows is the big one in Lubbock.

• Shade the glass. Solar screens, blackout curtains, or closed blinds through the afternoon make a real difference in west-facing rooms.
• Seal the leaks. Weatherstrip exterior doors, caulk gaps where hot air sneaks in, and top up thin attic insulation.
• Move heat outdoors. Run the oven, dryer, and dishwasher in the evening instead of the 5 p.m. peak.
• Keep the outdoor unit clear — not boxed in. A condenser caked with grass, cottonwood fluff, and blown dust can't shed heat. Give it a couple feet of clearance.

Do leaky ducts really waste that much cooling?

In most Lubbock homes the ducts run through an attic that tops 120° on a summer afternoon, and every supply-side leak dumps air you paid to cool into that attic instead of your rooms. Telltale signs: rooms that never quite cool down, weak airflow at far registers, and bills that seem high for the size of the house. Sealing and insulating ductwork is a job for a pro with the right equipment, and it's one of the fixes that keeps paying off every month.

One myth worth killing while we're here: closing vents in unused rooms doesn't save money — it raises duct pressure, forces more air out through the leaks, and can freeze the coil.

Does AC maintenance actually lower my bills?

Yes — a neglected system uses more electricity for the same job. A condenser coil caked in South Plains dust can't reject heat, a low refrigerant charge stretches every cycle, and a struggling blower moves less air per watt. A pre-season tune-up that cleans the coils and verifies the charge keeps the system at its rated efficiency; what it costs varies — call for a quote — but it's small next to a summer of inflated bills. If cooling has already dropped off, start with our AC repair page.

Age matters too. A system 12–15+ years old was built to a much lower efficiency standard than today's units, and the gap shows on every summer bill. When a big repair lands on an old unit, it's worth comparing that cost against replacing the system with a modern high-efficiency one.

When is a high bill a sign something's wrong?

Compare the bill to the weather first — a week of 105° days raises anyone's usage. But if usage jumps while the weather hasn't changed, or the system barely shuts off, blows air that isn't cold, trips the breaker, or ices up, you're past efficiency tips and into repair territory. Running a struggling system all summer is the most expensive option of all.

The fastest way to get it looked at is to call, or request a callback and we'll connect you with an independent local Lubbock HVAC pro.

Frequently asked questions