There’s nothing like stepping into a perfectly cooled home on a warm day. But achieving that comfort often depends on one critical tool—the thermostat. If you've been using "HEAT" or "OFF" for the winter and spring, now's the time to change your thermostat to "COOL" or "AUTO." This simple switch can ensure your home stays consistently comfortable while maximizing your HVAC system's efficiency.

Why Changing Your Thermostat Matters

Your thermostat is the command center for your home’s heating and cooling system. It determines when and how hard your HVAC unit works. Choosing the wrong setting—or sticking to the same one year-round—can either overwork your system or leave your home uncomfortably hot or stuffy.

Switching to "COOL" or "AUTO" as the seasons change ensures your system responds to the right temperature range, helping you:

Save Energy by running your AC only when needed.

Maintain Comfortable Temperatures effectively throughout the day.

Extend HVAC System Lifespan by preventing overuse.

Even a seemingly small adjustment can have a big impact, both on your family’s comfort and on your energy bill.

What’s the Difference Between COOL and AUTO?

You’ve probably seen the "COOL" and "AUTO" settings on your thermostat, but they mean different things. Here’s a breakdown:

COOL Mode

When you set your thermostat to "COOL," the system continuously monitors the indoor temperature. If it rises above the target temperature, your AC kicks on to lower it. Once the desired temperature is reached, the system shuts off.

AUTO Mode

When set to "AUTO," the thermostat controls both heating and cooling. It automatically activates heating or cooling depending on the indoor temperature relative to your set range (e.g., 68°F–74°F). The fan only runs when the system is actively heating or cooling, which maximizes efficiency.

Ultimately, both settings are effective, but "AUTO" is a better choice if energy efficiency is a priority. On the other hand, "COOL" is great when you want more immediate, hands-on control of your air conditioning.

How to Change Your Thermostat to COOL or AUTO

Switching to "COOL" or "AUTO" is refreshingly simple and takes just a few minutes of your time. Follow these steps:

Locate the Thermostat:

This might be a digital display or an old-school dial thermostat.

Choose Your Setting:

If you’re ready for consistent cooling, set it to "COOL." If you’d prefer the thermostat to automatically switch between heating and cooling, select "AUTO."

Set Your Desired Temperature:

Choose a temperature that’s comfortable for your household. For the summer months, we often recommend setting your thermostat between 72°F and 75°F to balance comfort and energy savings.

Double-Check the Fan Setting:

Thermostats typically offer two fan modes—"ON" and "AUTO." We recommend leaving it on "AUTO" so the fan only runs when necessary.

Monitor for Consistency:

Keep an eye on your home’s temperature over the next few days. If adjustments are needed, tweak the setting slightly to ensure maximum comfort.

Tips to Maximize Your Comfort and Efficiency

Now that you’ve set your thermostat to the setting you want, here are some bonus tips to for your HVAC system’s performance:

1. Schedule Regular Maintenance

Preventative maintenance is critical for keeping your HVAC system running smoothly year-round. Schedule an annual check-up with licensed professionals to ensure your system is operating at its peak.

2. Use a Programmable or Smart Thermostat

Programmable and smart thermostats add a layer of efficiency by learning your habits and automatically adjusting temperature settings. This way, you can keep cooling costs down without sacrificing comfort.

3. Seal Air Leaks

Check windows, doors, and ductwork for potential air leaks that might escape or allow warm air in. Seal gaps with weather stripping or caulk to maintain a consistent indoor temperature.

4. Utilize Ceiling Fans

Ceiling fans work in tandem with your thermostat by circulating cool air. They make your home feel 3–4°F cooler without increasing AC usage.

5. Optimize Your AC Schedule

If your home is vacant during the day, set your thermostat to a slightly higher temperature (like 75°F). Program it to cool to your preferred temperature about 30 minutes before you plan to get home.

Is It Time for a Thermostat Upgrade?

Older thermostats can limit your HVAC system’s efficiency and responsiveness. If your thermostat lacks "COOL" or "AUTO" settings, it may be time for a replacement. Upgrading to a smart thermostat or a modern programmable model can further enhance your home’s comfort and energy savings. Plus, many smart thermostats come with features like energy usage tracking and remote access.

Take Control of Your Comfort Today

Switching your thermostat to "COOL" or "AUTO" is one of the simplest steps you can take to enhance your home's comfort and HVAC system efficiency. Whether you’re focused on lowering energy bills, reducing wear and tear, or simply enjoying a cool, welcoming space, this adjustment puts you on the right track.

​For homeowners looking for more personalized guidance or expert HVAC assistance, contact our team today! Our experienced technicians can answer all your questions, perform seasonal maintenance, and help you explore thermostat options that suit your lifestyle. Your comfort is our top priority—because everyone deserves the perfect indoor climate, no matter the season.