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Recognize Refrigerant Leaks From Your AC Unit the Easy Way

Mon, 29 Jun 2026 09:39:51 GMT

When your AC system starts showing unusual signs, it's a good idea to pay attention. When those signs indicate a refrigerant leak, that goes double. While air conditioning units are designed to keep their refrigerants in a closed system, they can still pose a risk of toxicity and other hazards if the system is worn or damaged enough to start leaking.

To give you an idea of how things could go wrong, in 2025 a Freon leak in a Michigan motel’s AC unit caused a mysterious illness and a full-on HAZMAT response. In 2024, an entire Washington D.C hi-rise had to be evacuated due to a suspected leak. These can be serious situations, and you should call a professional as soon as possible when you recognize the issue.

The best way to make sure that your AC unit’s refrigerant stays where it’s supposed to be is to take good care of the system and have a professional check it regularly. However, you’ll also want to know how to recognize a possible leak situation in order to react to it. Here's a handy explainer on how to do so.

Weird Sounds and Smells

If the sound of your AC unit changes in one way or another, you should take notice. In case of a refrigerant leak, the particular sounds you should pay attention to are a lot like hissing or bubbling. If you hear your unit make noise like this, it often indicates that there’s a hole somewhere in the system.

Your nose is another good way to detect a potential leak. Normally, your AC unit shouldn't smell. However, if you do notice an exhaust smell , you should act immediately. By the time your nose can detect the coolant, chances are that it has been leaking for quite a while, and you should call a professional immediately.

Ice in the Unit and Moisture in the Air

One extremely good way to detect AC unit refrigerant leaks is simply checking out your system for frost or ice every once in a while, even when the weather is sweltering. If you do notice ice somewhere in the unit, there’s a chance that refrigerant has been leaking out , which in turn causes moisture to freeze up inside the unit. The most likely place for this to happen are the evaporator coils, but really, ice anywhere in the unit is a sign of trouble.

Speaking of moisture, you should also suspect a refrigerant leak if your house suddenly and unexpectedly seems a lot more humid than usual. Since AC units manage moisture as well as temperature, suddenly noticing that your home feels far clammier than usual can mean that the unit is losing its refrigerant.

The Unit Performs Worse, But Your Energy Bill Spikes

If none of those other signs present themselves, you may be able to notice that something’s up with two basic things: Your comfort and your wallet. Air conditioning needs coolant to function properly, and a leak will affect its ability to produce cool air the way it should. As such, you will likely notice that the AC unit will not perform according to its settings. Even if the unit does manage to hit the required temperatures, it’ll have to work extra hard to do so. Because of this, your energy bill might suddenly spike due to the increased amount of power the system needs to use.

These issues, of course, may indicate all sorts of other problems with your AC unit, as well. Even so, if you suddenly notice something like this, it's worth taking a look at the system in order to check if it shows any of the other signs of a refrigerant leak.

HVAC Refrigerant Rules Are Changing — What You Need to Know

Mon, 29 Jun 2026 09:15:37 GMT

There’s a lot more to HVAC units than just keeping them operational and remembering to maintain them. There are also industry regulations that might affect the way your system. In fact, 2026 is a touchstone year on this front, because it marks the next stage of a major refrigerant rule that has been in the works for quite some time now.

The requirements will become effective on July 27, and they’re about the installation of new HVAC units that use older R-410A refrigerants. Per demands of the American Innovation and Manufacturing Act of 2020, the systems using old refrigerants have already been on their way out for a while. Now, these older units have some breathing space, because the new rule allows the installation of existing HVAC systems that use R-410A until supplies run out.

Let’s take a closer look at what’s going on, and how it could affect you and your system.

What is the New Refrigerant Rule About Anyway?

The environment.

The American Innovation and Manufacturing Act of 2020 comes courtesy of the U.S. Environmental Protection Agency, which is taking HVAC refrigerants toward a more ecological direction. In the long run, this means that every HVAC system in the country will eventually be using new A2L refrigerants instead of the old R-410A ones.

These things take time, of course, and the last few years have been a transitional period. After January 1, 2025, HVAC units that used the old refrigerants haven’t been manufactured anymore, so they’re already slowly going off the market. On January 1, 2026, it became forbidden to install units that use the old R-410A refrigerants, but that deadline turned out to be too tight for the industry.

EPA has now amended the rule, and July 27 marks the date when older HVAC units can be installed again. It’s going to be an “while supplies last” kind of situation, since they aren’t manufactured anymore.

It’s also good to note that the rule won’t apply to certain simpler systems, such as window AC units. They’re following their own phase-out timeline, where products with old refrigerants can be sold until January 1, 2028.

What Was Wrong with the Old Refrigerants?

In a nutshell, the old R-410A refrigerants have more greenhouse gases than the new A2L ones . This means that the A2L refrigerants have lower global warming potential over time.

How Will This Affect Your Air Conditioning System?

Unless you’re a homebuilder, renovator, or otherwise making big HVAC decisions at this very moment, this probably won’t cause any immediate issues. Regardless of when your current unit was installed and what refrigerant it uses, it’s completely all right to keep using it until the natural end of its life cycle. Spare parts should also remain available, because older units need to be fixed and maintained, too.

Still, if you’re either using or planning to get a system that uses the older R-410A refrigerant, it’s good to remember that the technology is slowly being pushed to the side. Yes, units can still be bought and installed, and components will remain in production for maintenance purposes. However, the industry will manufacture less and less R-410A over the years, with the goal of producing just 15% as much as it does now by the year 2036. This means that at some point, R-410A will be pretty hard to come by, so there will come a day when refrigerant leaks in older systems become way more challenging to fix.

Sometimes, Leaving Your Thermostat on Auto is a Bad Idea

Mon, 29 Jun 2026 08:48:54 GMT

Air conditioning units have come a long way over the years. These days, you don’t really need to tinker with the settings too much in the long run. Instead, you can simply leave the unit on “Auto” and go about your day while the system does all the work.

The “Auto” setting is great, but like most things in life, it’s not perfect. In fact, there are certain situations where leaving your AC on “Auto” may actually be a bad idea. By paying attention to the specific conditions in your home, you can figure out the optimal setting for your air conditioning and influence its effectiveness in a substantial way.

Let's dive in and find out what the best AC setting in your home might be , and why it may not always be “Auto.”

What’s the Difference Between “On” and “Auto” Anyway?

First, let’s look at the key differences between the “On” and “Auto” settings. “On” is exactly what you imagine it to be. The fan stays on as long as the setting does, and as a result, the air moves around more.

The more modern “Auto” mode uses the unit’s sensors to regulate and adjust the temperature and humidity levels. This helps the AC maintain steady conditions in your home. However, users who appreciate the constant air movement of the “On” setting should note that “Auto” only keeps the fan on when it needs to, a few minutes at a time.

On paper, the fact that “Auto” only cools (or heats) the room when its sensors say so makes it the more economically logical setting of the two. However, the actual difference between the two is not as big as you might assume, and may only amount to around 5% of the operational cost.

“Auto” Might Seem Like the Easy Choice, But Not Always

If you don't want to pay too much attention to your AC, it can be tempting to just leave the setting on “Auto” and be done with it. This is exactly what it’s made for, of course. But you’ll only reap its full rewards in a situation where your home itself is built for the “Auto” setting’s assumptions.

“Auto” is a good option for an ideal scenario where your home is properly insulated and holds heat according to modern standards. In many buildings, especially in San Marcos, that isn't necessarily the case. This can mean that the lack of constant fanning action with the “Auto” setting can distribute the temperature unevenly, and you will notice colder and warmer spots around the house.

The weather on any given day will also be a factor when deciding on the setting. If there are major temperature changes or a lot of humidity, the “On” setting can be a significantly better bet than “Auto.”

What About Leaving the AC On While You’re Away?

Regardless of which setting you use, you may be wary of leaving the AC running while you’re away from your home. Perhaps surprisingly, you absolutely should leave it on . Apart from the obvious issues of returning to a hot and humid home after a long day away, keeping your AC running while you’re out and about is actually better for the system than constantly switching it on and off as you come and go.

When it’s constantly on, the AC unit keeps the temperature steady throughout the day. On the other hand, turning it off while you’re away means that the system will have to pull a straining double shift of cooling down an overheated, humid home once you return and turn it back on. In the long term, this will cause wear and tear, which can amount to more costs down the line.

The First AC Unit Was Powered by Horses to Fight Diseases

Mon, 29 Jun 2026 08:34:54 GMT

It's easy to look at your AC unit and take it for granted, at least as long as it's in working condition. If you ever think about its history, it can be tricky to picture any really interesting developments along the way. Surely, an AC unit was always meant to be something that regulates the temperature in your home, right?

Funny enough, that's not the case. In fact, AC units got their start in a very different way than you might expect. Their original purpose was to battle disease, and there was a stage during their development process when they were going to be powered by actual horses. Sadly, this doesn’t mean that past AC units came with a complimentary bronco. Still, there are plenty of interesting things to know about the first, weird AC contraption.

The Strange Beginning of Temperature Regulation

The guy who came up with modern cooling units was one Dr. John Gorrie , who patented his version in 1851. Gorrie specifically meant his invention to regulate temperature in hospitals. According to his philosophy, cooler hospitals could control the spread of malaria and other diseases, and he was serious enough about his AC unit mission that his first version involved physically shipping ice from cooler areas to his native Florida.

Unsurprisingly, this turned out to be a bad long-term strategy. So he went back to the drawing board and created an ice maker that could be powered by steam, water, wind ... or horses. It wasn’t as handy as today’s systems, but the technology was good enough that the coil-based air-cooling process he came up with is still used in some refrigerators.

The reason you don’t have a John Gorrie AC unit with a little horse logo in your home right now is that the early bird doesn’t always get the worm when it comes to world-changing inventions. Gorrie’s pioneering work had plenty of potential, but his most prominent financial backer died before his invention could hit the manufacturing stage. Gorrie’s own death in 1855 threw a 50-year wrench in the development of AC units, and we all kept sweating during the hot seasons.

How AC Finally Made Its Way to Texas

It wasn’t until 1902 when someone picked up the slack after John Gorrie. That’s when Willis Carrier put his thinking hat on to figure out a major humidity problem in a Brooklyn publishing company. He solved the issue with the very first humidity controller, which he dubbed the Apparatus for Treating Air . Realizing a good thing when he saw it, Carrier became one of the founders of Carrier Engineering Corporation.

It still took some time to get to the compact AC units of today, of course. When air conditioning was debuted to the public at St. Louis World’s Fair in 1904, the system they used to cool the State of Missouri Building ran on ammonia instead of horses, and had the distinct disadvantage of weighing 30 tons. Still, the first general-purpose computer weighed the same, and chances are that the phone or laptop you’re reading this on is considerably lighter.

AC systems also got smaller and better over the years. After Henry Galson debuted a small and affordable version of the window AC unit in the 1940s, the technology made a quick jump from public places to homes.

Texas weather being what it is, the state was obviously watching the development of air conditioning with great interest. The first building in Texas to have air conditioning was likely the First Presbyterian Church in Orange in 1912. Another prominent early adapter was the Rice Hotel Coffee House in Houston, which got its ice-based temperature regulation system in 1922. Eventually, the arrival of small and reasonably priced systems completely changed the game, and the popularity of AC systems exploded in the 1950s.

It’s probably fair to say that we haven’t looked back since.

How the Atlantic Hurricane Season Affects Your HVAC Unit

Mon, 29 Jun 2026 08:19:40 GMT

Whenever news outlets start covering weather events with buzzy names, you might want to think about your HVAC unit.

Heat waves and cold spells obviously affect the way you use your system, but there are also other weather phenomena that you should be prepared for. Some of the more eventful ones happen during the Atlantic hurricane season , which is precisely what it says on the label. Starting in June and running all the way through November, this is when particularly big storms and hurricanes form on the Atlantic Ocean and potentially cause trouble in Texas, such as Tropical Storm Arthur, the first named storm of the 2026 season.

Your average Atlantic hurricane season will statistically have around 14 named storms and 10 hurricanes. They generally start turning up in August, and of course, their numbers vary from year to year.

Fortunately, there is sometimes a silver lining from the Pacific side of things. One thing that can and often does affect the Atlantic hurricane season is El Niño , the recurring Pacific Ocean phenomenon where unusually warm surface water causes various large-scale weather patterns. A big El Niño usually means a less severe Atlantic hurricane season, and since 2026 is a “Super El Niño” year, it could mean fewer hurricanes than usual.

This is all statistics and weather prediction, though, so there’s an element of estimation and educated guesswork involved. As such, it’s good to keep up to date with how the weather is treating your area, and keep a minimum of three days’ worth of emergency supplies handy in case the skies get seriously rough. If you’re unsure what these supplies should include, several government agencies provide detailed suggestions for hurricane supply lists ... and when you’re all prepped up, it’s time to make sure that your HVAC unit is ready for the storm, as well.

Stormproofing Your HVAC During Hurricane Season

The key thing for keeping your HVAC unit as ready for harsh weather as possible is to stay ahead. Regular, professional maintenance checks will help your system stay shipshape and help it withstand the forces of nature. For hurricane season, though, there are several things you can (and should) take care of yourself.

Your outdoor HVAC unit needs structural integrity, meaning you’ll want to keep it in one piece. So, doing your best to make sure the unit is physically as secure as possible is your first step.
Luckily, stormproofing your outdoor HVAC unit is far from impossible. First, take some time to check that it’s not at risk of being damaged by potential flooding water. Then, make sure that the unit has shelter from whatever debris an approaching storm may throw its way. Remove all loose and potentially damaging items from its vicinity, and make sure that it’s safely secured – preferably with properly installed hurricane straps .
For the unit itself, you can use a protective AC unit cover. If you don’t have one, you can go DIY and construct one by strapping, say, a tarp or plywood around the unit. Window units can simply be unplugged and removed from the window ahead of a hurricane.

Apart from taking steps to ensure that your HVAC unit is physically as protected as possible, you should also be aware of when the system can safely be used during heavy weather. If it’s just raining, you can use AC just fine, as long as the outdoor unit isn’t obstructed in any way. However, in the event of heavier weather like a lightning storm or an outright hurricane, you should make sure that the system isn’t in use and turn it off at the breaker. Once the hurricane passes, you should also take time to check your HVAC system for potential storm damage before turning it back on.

Why You Choose Your Thermostat Settings in the First Place

Mon, 29 Jun 2026 08:00:26 GMT

It's not exactly uncommon to hear that thermostat settings can cause trouble. “ Thermostat Wars ” are a very real thing, and people in the same household or workplace have been known to feud over their preferred indoor temperatures pretty much since thermostats first arrived on the scene.

Still, that’s just the tip of the iceberg when it comes to the ways thermostats can influence and reflect our behavior. Let’s take a look at a couple of ways your thermostat settings can tell a bit about you as a person.

Your Optimal Setting Reflects How You Were Brought Up

Did you know that you have a “thermal baseline?” It’s the thermostat setting that you genuinely feel that you’re most comfortable with, and there’s far more to it than just randomly-acquired personal preference. According to one study , it comes from your childhood, and the optimal thermostat settings you learned back then are still sneakily influencing your behavior today.

Yes, the settings you learned to know as “optimal” when you were a child eventually became an integral part of your temperature regulation behavior. In a nutshell, people who grew up in a situation where they had to wear a sweater indoors are likely to prefer similar low-temperature settings as adults. On the other hand, those who grew accustomed to more tropical settings learned to enjoy warmer indoor temperatures, and insist on thermostat settings that reflect this. It’s not just your experiences in your childhood home, either. The preferred settings in your friends’ and neighbors’ homes have all shaped up your ideas about thermostat use — so stealthily that you may not have even noticed it.

Amazingly, this implies that the Thermostat Wars are apparently multigenerational, and your stance in them says something about where and how you grew up. Of course, there are exceptions to the rule, too. If you didn’t feel all that connected to the community growing up, you might be a complete rogue with thermostat settings.

Optimal Thermostat Settings May Also Stress You Out

Settling on a comfortable setting is good for your well-being, whereas home that are too hot or too cold can become actual health risks. However, even a person’s preferred temperature can become a source of inner turmoil. Two Public Health Wales surveys from 2022 and 2023 discovered that the participants’ stress levels spiked for months before the cold period arrived, because they were concerned about the cost of heating. Due to these worries, they ended up keeping their home colder than was comfortable.

Unfortunately, creative thermostat tweaking may not even be a particularly effective energy-saving strategy. According to a study from the Georgia Institute of Technology and Carnegie Mellon University, altering thermostat settings manually is actually the less cost-effective option in the long run. Many people either don’t have access to smart thermostats, are set in their habits, or are simply wary of the cost of comfortable thermostat settings. This leads them to either settle on one thermostat setting or change it manually according to the season, which generally leads to less comfort and more energy costs.

Since thermostat use and human behavior are so interconnected, it has been suggested that the energy consumption issues could be treated with better access to smart thermostats and more effective thermostat management education. Still, even if you take away the cost factor, everyone who’s fought a family member or a colleague over thermostat settings knows that attitudes can be hard to change when it comes to this particular subject.

Meaning it’s best for both your stress levels and bank account to plan for settings that everyone can live with, because you can’t change what people grew up with their entire childhood.