If your AC is running but not cooling, the cause is almost always one of three things: restricted airflow from a dirty filter or coil, a refrigerant problem, or a failed electrical component such as the capacitor. Which one it is can usually be narrowed down in about five minutes by checking whether the outdoor unit is running and whether the refrigerant line is iced over.
Always Air Services has run no-cooling calls across Port Charlotte, Punta Gorda, North Port, Englewood, Venice, Sarasota, Cape Coral, and Fort Myers since 2016. The list below is ordered roughly by how often we actually find each cause, not by how dramatic it sounds.
These take five minutes and resolve a meaningful share of calls before a technician is needed:
"If the indoor fan runs and the outdoor unit sits silent, you are looking at an electrical fault, not a refrigerant problem."
The most common cause and the cheapest fix. A blocked filter starves the evaporator coil of airflow, which drops cooling capacity and can freeze the coil outright. In this climate, with systems running most of the year, filters load up faster than the printed replacement interval suggests.
This one is close to a Southwest Florida specialty. Your system pulls enormous moisture out of the air, that water drains away, and algae builds up in the drain line. When it clogs, a safety float switch shuts the system down on purpose to prevent water damage. The AC appears dead with no obvious cause. Our AC repair team clears these constantly through summer.
The capacitor delivers the jolt that starts the compressor and outdoor fan. When it fails, the indoor fan keeps running while the outdoor unit hums, clicks, or does nothing. Capacitors are a wear item, and heat shortens their life, so they fail more often here than in milder climates. It is an inexpensive, same-day part.
Ice on the copper line or visible frost on the indoor coil. It is a symptom rather than a root cause, driven by either restricted airflow or low refrigerant. Turn the system to OFF and the fan to ON to thaw it, which takes a few hours. Do not keep running it, because liquid refrigerant returning to the compressor is how compressors die.
The outdoor coil sheds heat, and it cannot do that when it is packed with dust, grass clippings, or salt residue. Coastal properties in Charlotte, Sarasota, and Lee counties see this faster than inland ones. The system runs continuously and never reaches setpoint. This is what professional coil cleaning addresses.
Refrigerant is not consumed. If it is low, it escaped, which means there is a leak. Topping the system up without finding the leak means paying for refrigerant twice, and that is a worse deal every year as R-410A supply tightens. Proper leak detection and repair locates it first.
An electrical relay that engages the outdoor unit. Contacts pit and corrode over time, and in coastal air they corrode faster. Symptoms mimic a bad capacitor: indoor air moving, outdoor unit not starting.
Furniture over a return, or supply vents closed in unused rooms. Closing vents does not save money on most residential systems; it raises static pressure and can freeze the coil. Every vent should be open.
The least common on this list and the most serious. Signs include the outdoor unit tripping the breaker repeatedly, loud grinding, or the system running with no meaningful temperature drop after everything else has been ruled out. On an older system this is the point where repair versus replacement becomes a real decision.
A licensed Always Air technician will diagnose it properly, explain what failed in plain terms, and quote it upfront before any work starts. Same day appointments across Southwest Florida, 24/7 when the house is already hot.
Call (941) 467-4243 or request a callback →Anything involving refrigerant is legally restricted to EPA Section 608 certified technicians. That is federal law, not a company policy, and the DIY recharge cans sold online do not change it. Beyond the legal line, these need a professional:
Three local conditions stack the deck. Runtime is the first: systems here work most of the year rather than one season, so wear items reach end of life sooner. Humidity is the second, since your AC is continuously removing moisture, which is why condensate drains clog here and rarely do up north. Salt air is the third, corroding condenser coils, cabinets, and electrical contacts on coastal properties.
Which is why the single highest-return thing you can do is have the drain line cleared and the coils cleaned before summer rather than during it. That is most of what an AC maintenance visit is for, and it prevents a meaningful share of the failures on this page. If it is already 95 degrees inside, skip ahead to 24-hour emergency AC repair.
Most often restricted airflow from a dirty filter or coil, low refrigerant from a leak, or a failed capacitor stopping the outdoor unit. Check whether the outdoor fan is spinning: if it is not, the cause is usually electrical. If both units run but the air is only slightly cool, suspect airflow or refrigerant.
In Florida the usual answer is a tripped condensate float switch. Humidity means your system drains a lot of water, algae clogs the line, and a safety switch shuts the system down deliberately to prevent water damage. The system looks dead but nothing is broken. Clearing the drain line resolves it.
Switch the system to OFF and set the fan to ON so it thaws, which usually takes a few hours. Do not keep running it in cooling. A frozen coil sends liquid refrigerant back to the compressor and can destroy it. Once thawed, replace the filter. If it freezes again, you likely have a refrigerant leak and need a technician.
No. Handling refrigerant requires EPA Section 608 certification under federal law. Beyond the legal issue, low refrigerant always means a leak, so adding more without repairing it just vents it again. Overcharging also damages the compressor. This one genuinely needs a certified technician.
A healthy system produces roughly a 17 to 20 degree difference between the air entering the return and the air leaving the supply vents. On an extreme afternoon it may run nearly continuously and still hold only 20 or so degrees below outdoor temperature, which is normal. Running constantly while losing ground is not.
Treat it as one if indoor temperatures are climbing above 90 degrees, if anyone in the home is elderly, very young, or has a heart or respiratory condition, or if there is a burning smell or repeated breaker tripping. Florida indoor heat becomes a health issue quickly. Otherwise, same-day service is usually sufficient.
Licensed, insured, EPA certified. Upfront pricing before any work starts, financing available, and 24/7 dispatch when the air stops moving.
From emergency AC repairs and refrigerant leak detection to full HVAC system replacement, ductwork installation, heat pump service, and indoor air quality solutions, our HVAC technicians are ready to respond.
If you are experiencing no cooling, system failure, electrical issues, or AC leaks, call now for priority dispatch at 941-467-4243.
Always Air has served residential and commercial clients in Port Charlotte and Southwest Florida since 2016. Based in Port Charlotte, our insured technicians provide reliable AC repair, installation, maintenance, heat pump services, and emergency HVAC repairs across Charlotte, Sarasota, Lee, and DeSoto counties. Always Air is Always There.
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