Florida AC Running All Year? Our HVAC Experts Answer Your Top Money-Saving Questions
If you live in Florida, you already know your AC doesn't get much of a break. We don't have much of an “AC season” here, forcing our systems to run for much of the year. One of the questions we hear all the time is: “How can I keep my house cool without my electric bill getting out of control?”
As HVAC professionals, we spend our days working on the systems that keep Florida homes cool and comfortable. So we put together some of the questions we hear most often.
Q: What temperature should I keep my thermostat at to save money?
A: The higher you can comfortably set your thermostat, the less your AC generally has to work. There isn't one perfect temperature for every household. Find a setting that's comfortable for your family, and consider raising it a few degrees when you're away from home. Many systems also have programmable settings that let you automatically raise the temperature a few degrees to suit your schedule. The important thing is not to make your AC fight to maintain a temperature that's unnecessarily low.
Q: Should I keep my AC fan on AUTO or ON?
A: If you're looking to save energy, AUTO is usually the better choice.
With the fan set to ON, the blower continues running even when the system isn't actively cooling. AUTO allows the fan to run when the system is calling for heating or cooling. It's a small thermostat setting that can make a difference over time.
Q: How often should I change my AC filter?
A: Don’t wait until the filter looks terrible. A dirty filter restricts airflow, making your system work harder. A clean filter also helps your system manage humidity more effectively, which is especially important in Florida’s climate. How often you need to change it depends on the filter size, MERV rating, system runtime, indoor air conditions, and the manufacturer’s recommendations. Most homes do well changing filters every 1–3 months, but some situations require more frequent changes:
Basic 1-inch filters — about every 1–2 months
Pleated filters — about every 2–3 months
High-efficiency filters — 3 months or longer, depending on the filter and conditions
Homes with pets — about every 1–2 months
Allergy or asthma households — about every 1–2 months
Construction dust — check monthly and replace as needed
Vacation or low-use homes — every 3–6 months, depending on runtime and filter condition
Q: Should I turn my AC completely off when I leave?
A: In Florida, we generally wouldn't recommend turning your AC off when you leave for the day. You are dealing with heat and humidity, and letting your home get extremely warm and humid can create other problems. It is usually better to raise your thermostat a few degrees while you are away and set it back to your normal temperature when you return.
For extended stays, such as leaving for a weekend or several days, you can raise the temperature even more. Keeping the home at a higher but steady setting helps control humidity and prevents the system from having to work much harder to cool the house again when you come back. Many Florida homeowners set their thermostat between 78–82°F for short trips and slightly higher for multi‑day trips.
Q: Why does my AC seem to run constantly in the summer?
A: On a really hot Florida day, long run times aren't necessarily a problem. Your AC has to remove both heat and humidity from your home. But there's a difference between running a lot because it's hot outside and running constantly because something isn't working properly. If your system is running and your house still isn't reaching the temperature you've set, it's worth having it checked.
Q: Can ceiling fans help me save money?
A: They can help you feel cooler, which may allow you to set your thermostat a little higher. Just remember that ceiling fans cool people, not the room itself. Turn them off when nobody is in the room.
Q: Does regular AC maintenance really help with energy costs?
A: Keeping your system maintained helps it operate as efficiently as it can and gives you an opportunity to catch smaller problems before they become bigger ones.
This is especially important in Florida, where your AC may work hard for thousands of hours each year. A system that's struggling because of airflow problems, a dirty coil or another issue may have to run longer to do the same job. Regular maintenance also helps extend the lifespan of your system, which is a major long‑term cost factor for Florida homeowners.
Q: Can my windows or small air leaks affect how hard my AC has to work?
A: Yes. In Florida, heat and humidity can enter your home through older windows, worn weatherstripping, or small gaps around doors and frames. Even minor leaks can let warm, humid air inside and push conditioned air out, forcing your AC to run longer to keep the house comfortable. Improving window seals, adding weatherstripping, or using blinds and curtains during peak sun hours can help reduce heat gain and lighten the load on your AC. Window tinting or UV‑blocking films can also reduce heat gain and help lighten the load on your AC.
Q: What if I'm doing all of these things and my electric bill is still high?
A: That’s when it’s time to look beyond the thermostat. Sometimes the issue isn’t how you’re using your AC at all. Ductwork leaks, poor insulation, airflow restrictions, an aging system, or even an improperly sized unit can all make your home harder to cool. High indoor humidity can also be a sign that something deeper is going on, even if the AC seems to be running normally.
A good example: if your AC runs constantly but certain rooms never feel comfortable, the problem may be airflow or ductwork—not your thermostat settings. If your system seems to be working harder than it should, it’s worth having a professional take a look rather than assuming you just need to set the temperature higher.
Our Advice for Florida Homeowners
Living in Florida means we're going to use our AC. That's just part of it. The goal isn't to avoid using your air conditioner. It's to make sure you're getting the most out of the energy you're paying for.
A few simple habits can help: keep your filter clean, use AUTO, adjust the thermostat when you're away, use ceiling fans wisely and stay on top of maintenance.
And if something doesn't seem right, give us a call. Sometimes finding a small problem early can save you from a much bigger repair — and an AC that's working harder than it should.
Do-All Heating, Air & Commercial Refrigeration
(904) 547-2168
Trusted Contractor Since 2014
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