Does Turning Up The Thermostat Save You Money In Summer?

August 18, 2025

When the electric bill spikes during the summer, it’s natural to think:

“I’ll just turn the thermostat up during the day to give my AC a break and save some on the power bill.”

Some even go further and turn the system completely off while they’re gone. But here’s the truth most homeowners don’t realize:

You may actually be costing yourself more, both in money and system wear.

What Happens When You Turn the Thermostat Way Up (or Off)?

Let’s say you raise the temp to 82° while you’re at work. Or worse, shut the system off completely.

During the day, your home heats up—sometimes into the 90s or higher inside, especially in humid Upstate SC homes.

By the time you get home and set the thermostat back down, your AC has to:

Run for hours non-stop
Remove all the trapped heat
Fight built-up humidity
Cool walls, furniture, and floors, not just the air

The result?

Longer run times, higher energy use, and more wear on your unit.

What’s Actually More Efficient?

The best approach isn’t turning it off—it’s keeping it steady and consistent.

Here’s what energy experts and HVAC pros (like us) recommend:

Set your thermostat to 72–75°F when you’re home
Never shut the system completely off in extreme heat
Use ceiling fans to circulate cool air (fans use far less electricity)
Consider mini-splits for problem areas like bonus rooms

Why Sudden Cooling Is Harder on Your System

Think of your AC like a marathon runner—not a sprinter.

It’s more efficient to keep it running steadily than to stop and start with massive temperature swings.

That “big catch-up” at the end of the day? It’s when many systems:

Freeze up
Overheat
Or trigger emergency repairs

BONUS: Summer Thermostat Myths—Busted

Myth: “Turning off the AC saves more than leaving it running.”
Truth: The energy required to cool a superheated house often costs more than keeping it moderately cool.

Want More Summer Savings (Without the Guesswork)?

Let us help you dial in your system for maximum comfort and efficiency. Whether it’s a simple thermostat upgrade or zoning your AC for better airflow, we can recommend the best solution for your home.

Call M1 Services today at (864) 642-0858 or book online!