If your AC has been struggling to keep up with the Florida heat, a refrigerant leak could be the culprit. As a technician who has spent years working on air conditioning systems across Orlando and Southwest Florida, I can tell you that refrigerant leaks are one of the most common and costly problems I see. The good news is that most leaks are preventable once you understand what causes them. Let me walk you through what goes wrong, what to watch for, and how to protect your system.
Most AC refrigerant leaks start with corrosion on copper lines, weak joints, or accidental damage to the HVAC system.
Common warning signs include reduced cooling, higher energy bills, frozen evaporator coils, and a hissing sound near the AC unit.
Prevention centers on regular professional maintenance, clean filters and coils, protecting outdoor lines, and proper installation by licensed HVAC technicians.
Florida homeowners should turn the air conditioner off if they suspect a refrigerant or Freon leak and call a licensed pro rather than attempting DIY fixes.
Cool Today offers same-day leak diagnosis, repair, and AC replacement options with expert air conditioning repair, service, and installation and strong warranties in the Orlando and greater Florida markets.
Refrigerant is the gas (sometimes called coolant or Freon) that circulates inside your air conditioning system in a sealed loop. It flows between the indoor evaporator coil and the outdoor unit, absorbing heat from the air inside your home and releasing it outside. That cycle is what allows your AC to remove heat and keep your rooms comfortable, even during a brutal July in Orlando.
You might hear people use "refrigerant," "Freon," and "AC refrigerant" interchangeably. Freon is actually a brand name for older refrigerant types, but in everyday conversation, it all means the same thing. Here are the most common types found in Florida homes:
R-22: Used in older systems (typically installed before 2010). Production was phased out in 2020, so remaining supply is reclaimed and expensive.
R-410A: The standard in most units installed from roughly 2010 through the mid-2020s.
Newer low-GWP refrigerants (like R-454B) are starting to enter the market.
The important thing to remember is that refrigerant never gets "used up" like gas in a car. It stays inside that sealed loop. So if your refrigerant levels are low, it always means there is a leak somewhere. Any AC refrigerant leak disrupts this cooling cycle, which leads directly to comfort problems, higher energy bills, and potential compressor damage.
Refrigerant leaks can affect any air conditioning system, even fairly new ones. Common causes of refrigerant leaks include corrosion and physical damage, and multiple issues often stack together: age of equipment, Florida humidity, vibration from the compressor, and accidental damage around the outdoor unit. Let me break down the specific causes I see most often in the field.
Corrosion is the number one cause of AC refrigerant leaks in Florida. Our heat, humidity, and coastal salt air (especially in Tampa, Sarasota, and Naples) slowly eat away at copper refrigerant lines and evaporator coils. Extreme temperatures can corrode metal components over time, and corrosion can also occur due to humid conditions and chemicals inside the home, like cleaning products, paints, and adhesives.
One type I see a lot is called formicary corrosion. It creates tiny pinhole leaks inside the copper tubing of evaporator coils, caused by indoor VOCs mixing with moisture and oxygen on coil surfaces. These pinholes can develop over just one to three years and are almost impossible to spot without professional tools. Corrosion is especially common in air conditioners with dirty coils or systems older than 8 to 12 years that have not had regular coil cleaning.
Look for greenish spots on copper, oily residue on the indoor air handler, or frequent frozen evaporator coils. Once corrosion is advanced, replacement of the evaporator coil or even the whole AC unit often makes more sense than repeated repairs.
Vibration can cause wear on tubing and fittings over time. Every time your compressor kicks on and off, the pressure changes stress brazed joints and flare connections. Over several Florida cooling seasons, those joints can loosen enough to start leaking refrigerant.
Improper installation is a major cause of early-life AC refrigerant leaks. Poor brazing, under-supported line sets, and over-tightened flares are problems I have seen firsthand on systems less than two years old. Properly tightened connections reduce the chance of mechanical leaks significantly. Vibration can be worse on rooftop units or outdoor condensers mounted on uneven pads, which Orlando and coastal homes sometimes have. Proper installation by a certified HVAC technician, with correct torque and supports, greatly reduces these leak risks.
Physical damage from landscaping can cause refrigerant leaks more often than you might think. Refrigerant lines that run outside the home can be punctured by weed trimmers, shovels, pressure washers, or during patio and fence projects. I have responded to calls in Orlando where a landscaper nicked a partially buried copper line while planting hedges.
Rodent damage or pets chewing on poorly protected insulation can also expose and weaken refrigerant piping over time. Keep a clear, visible path around the outdoor unit and refrigerant line set, and show service and landscaping crews where lines run. Refrigeration piping should be properly insulated, elevated off the ground where possible, and shielded from lawn equipment.
Aging equipment over 10 years may develop refrigerant leaks as rubber seals, Schrader valves, and service ports wear down. Aging components and thermal cycling can lead to seal degradation in HVAC systems, causing slow Freon leaks at connections that were once tight.
Even new equipment can sometimes have factory defects or shipping damage, leading to early refrigerant loss within the first year. If a new system develops a leak soon after install, homeowners should use manufacturer warranties and Cool Today's installation warranties. For very old, inefficient HVAC units with repeated leaks, system replacement with a modern, high-efficiency unit is usually more cost-effective than continuing to pay for repairs.
Symptoms of AC refrigerant leaks often look like other problems, so diagnosis by a pro is important. Multiple signs at the same time (for example, warm air plus frozen evaporator coils) strongly suggest a refrigerant issue rather than just a dirty filter. If you suspect a leak, shut the air conditioner off and call a licensed HVAC technician to protect the compressor.
A refrigerant-starved air conditioning system may run continuously yet struggle to reach the thermostat setpoint on hot Orlando afternoons. Higher energy bills can signal a refrigerant leak because the AC unit is forced to use more energy over longer cycles. Reduced cooling efficiency shows up as higher electric bills even if your daily habits have not changed. Compare your current power bill to the same month the previous year to spot an unexplained jump.
Inefficiency from low refrigerant also increases wear on the compressor, which is one of the most expensive other components in the HVAC system. A professional should measure pressures and temperatures using pressure gauges instead of guessing or offering a temporary fix like "topping off" AC refrigerant.
When refrigerant levels drop, the evaporator cannot absorb enough heat, so the air coming from vents feels cool at first but quickly turns lukewarm. Warm air blowing from vents indicates a refrigerant leak. Your home may start to feel sticky because increased humidity is a sign of low refrigerant, since the system loses its dehumidification ability.
Rooms far from the indoor unit or second floors in Florida homes are often the first places you notice hot air and comfort problems. Verify that filters are clean and vents are open, then consider a potential refrigerant issue if warm, humid air persists. Consistently long cycles or the AC running nearly nonstop on moderate days can be a red flag.
Ice buildup on evaporator coils indicates a refrigerant leak. Low refrigerant causes the evaporator coil to get too cold, leading to frost or ice on the indoor unit in your closet, attic, or garage. When the AC shuts off, the ice melts and can overwhelm the drain pan, creating water damage.
Frozen evaporator coils can also come from airflow issues like clogged filters, so both possibilities should be checked. Look for visible frost, ice, or moisture on or under the indoor unit. Turn the system off and let the ice melt completely before a technician arrives to prevent further strain on the compressor.
Hissing or bubbling noises suggest refrigerant is leaking. A hissing sound near refrigerant lines, the outdoor unit, or the air handler points to gas escaping under high pressure. You might also see oily spots on copper lines, the evaporator coils, or around service valves, since oil travels with the refrigerant.
Small leaks may only produce a bubbling noise or bubbling sounds when the compressor starts or stops, so intermittent sounds are still worth checking. Avoid inhaling fumes closely and keep children and pets away from the equipment area. Any odd noise combined with weak cooling performance is a strong reason to schedule prompt air conditioning service.
Refrigerant does not get used up. If levels are low, you have lost refrigerant through a leak that must be found and corrected. Repeatedly adding refrigerant without repairing the leak wastes money, increases environmental impact, and can violate EPA rules. Older refrigerants like R-22 contribute to ozone layer depletion, and even modern high-GWP refrigerants carry serious environmental concerns.
Refrigerant leaks can lead to compressor overheating and failure, which often triggers an emergency system replacement. Prolonged inhalation of refrigerants may lead to central nervous system depression, making even slow leaks a concern over time. In a typical Florida home, paying to add refrigerant every spring quickly costs more than repairing or replacing the leaking component. A single R-22 recharge can run $100 to $250 per pound, and larger systems need a lot of refrigerant.
Only EPA-certified HVAC technicians are allowed to handle refrigerants. DIY repairs of refrigerant leaks are illegal without EPA certification. Professional leak detection typically starts with a visual inspection and then moves to more advanced tools. During a service call, you will see gauges on the AC system, electronic leak detectors, and possibly nitrogen pressure testing.
Technicians use electronic leak detectors to find refrigerant leaks, along with UV dye and soap-bubble testing for visible confirmation. For stubborn or multiple leaks, nitrogen pressure testing helps locate very small pinhole leaks in evaporator coils or line sets. In humid Florida attics and garages, extra care is taken to avoid introducing moisture into the HVAC system during testing. Accurate leak detection reduces callbacks and avoids replacing the wrong components, saving you time and money.
Repairing leaks involves recovering refrigerant and patching damaged lines. Technicians may braze or replace sections of copper line, replace a leaking evaporator coil, or repair service valves causing slow leaks. In some cases, especially when coils are badly corroded or the unit is older than 10 to 12 years, replacing the entire AC system can be more practical.
After repairs, technicians pressure test systems with nitrogen after repairs and use nitrogen purging to prevent internal oxidation during installation. The system is then vacuumed down to remove air and moisture, and recharging requires the exact amount of refrigerant specified by the manufacturer. Cool Today technicians verify cooling performance by checking superheat, subcooling, and temperature split across the evaporator coils, and we follow all local Florida codes and EPA regulations.
Prevention is usually far less expensive than repair, and seasonal inspections help prevent refrigerant leaks from developing. Using qualified technicians ensures proper installation and maintenance procedures from day one. Choosing a reputable contractor like Cool Today helps avoid many early-life leak problems, and our lifetime parts and labor warranty options on select AC systems can protect you from future leak-related costs.
Schedule semiannual professional maintenance (spring and fall). Annual preventative maintenance is recommended for HVAC systems in humid areas like Florida, but twice a year is even better.
Changing air filters regularly can prevent airflow restrictions in HVAC systems. Swap them every 30 to 60 days during peak summer use.
Cleaning coils and changing filters improves system efficiency and helps prevent frozen evaporator coils.
Regular maintenance can identify early signs of corrosion and catch small refrigerant leaks before they develop further.
Routine maintenance can extend the lifespan of HVAC systems. Documented service reports track refrigerant levels over time, so you can spot slow leaks early.
Consider enrolling in a Cool Today maintenance plan that includes priority scheduling, regular tune-ups, and thorough leak checks.
Mark where refrigerant lines run outside so landscapers and contractors do not damage them. Use protective line set covers or conduits in areas where copper lines are exposed to sun, pets, or lawn equipment. Place the outdoor unit on a stable, level pad and consider vibration pads if the unit is noisy.
Allowing sufficient clearance around outdoor units prevents physical damage, and keeping outdoor units clear of vegetation helps optimize heat dissipation. Visually inspect the outdoor lines a few times a year for damaged insulation, kinks, or oily residue. Cool Today can upgrade or correct poorly routed line sets during replacement projects to reduce future leak risk.
Some AC refrigerant leaks can be repaired once and not return, but recurring leaks on a unit over 10 to 12 years old, or one using phased-out R-22, usually point toward a new system being the smarter investment. Weigh your total AC repair costs over the past two to three years against the benefits of a new, more efficient air conditioning system.
Newer systems are more efficient, easier to service, and often come with stronger manufacturer and Cool Today warranties. We offer free or low-cost replacement estimates, financing options, and, on select AC systems, lifetime parts and labor coverage through our AC installation services.
If you suspect an AC refrigerant leak, strange noises, or higher energy bills you cannot explain, Cool Today is here to help. We offer same-day service, 24/7 emergency AC repair, and experienced HVAC technicians familiar with Florida building codes and climate challenges across Orlando, Tampa, Sarasota, and Southwest Florida.
We handle everything from simple leak repairs and regular maintenance to full system replacement and indoor air quality upgrades. Schedule online or call for fast help. You do not have to diagnose the problem alone. A trained technician can quickly find and explain what is going on so you can restore comfort in your home.
These questions cover common homeowner concerns that go beyond what we covered above.
Small, typical residential leaks are usually not immediately life-threatening, but Freon exposure can cause respiratory irritation and headaches. Children and pets are more vulnerable to refrigerant exposure risks, so keep them away from leaking equipment. Turn the AC off, open windows and doors to ventilate, and call an HVAC professional. Strong chemical odors, dizziness, or headaches are signs of refrigerant poisoning and mean you should leave the immediate area right away.
Most accessible leaks take one to three hours to find and repair. If a coil needs to be replaced, the job may take most of a day. Total time depends on where the leak is located, how accessible the evaporator coils and refrigerant lines are, and whether parts are in stock. Many common parts are carried on Cool Today service trucks, which reduces wait times.
You can listen for a hissing sound, look for ice buildup on the indoor unit, and check for oily spots on visible copper lines. Take photos or short videos of anything unusual to show the technician. However, do not use DIY refrigerant cans or attempt to open the system. Formal leak testing and all refrigerant handling must be done by a licensed HVAC professional.
Many standard policies do not cover normal wear and tear, corrosion, or gradual leaks in an HVAC system. Sudden, accidental damage (for example, a large leak caused by a car hitting the outdoor unit) might be treated differently, but you need to check with your insurer. Cool Today can provide detailed repair invoices and documentation if you decide to file a claim.
Modern systems with improved coil coatings, better manufacturing quality, and enough refrigerant capacity tend to be more reliable when installed correctly. No system is completely leak-proof, but proper installation, quality line set routing, and routine maintenance greatly reduce the risk. Many new systems installed by Cool Today qualify for strong manufacturer warranties and, on select models, lifetime parts and labor coverage.
Sunny isn't just a cartoon character—he's the heart of our brand and a shining symbol of what we stand for. As the unofficial mascot of our Cool Today team, Sunny represents our commitment to keeping Florida families cool, comfortable, and cared for all year long. With his ever-present shades and cheerful attitude, Sunny reminds us that great service, strong community roots, and building lifelong customer relationships should always be at the center of what we do. When you see Sunny, you know you're in good hands!