![\"Technician](\"https:\/\/www.completeairandheat.com\/blog\/wp-content\/uploads\/2025\/07\/Complete-Air-And-Heat-common-ac-problems-in-summer-heat-humidity-in-florida.webp\")
<\/a><\/figure>\n\n\n\n1. AC Not Turning On or Cooling Properly<\/h2>\n\n\n\n
DIY checkups should include: <\/p>\n\n\n\n
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- Thermostat batteries <\/strong>\u2013 Before panicking, check the batteries in your thermostat. Dead batteries can cause your system to shut off or fail to respond.<\/li>\n\n\n\n
- Tripped breaker<\/strong> \u2013 Sometimes the issue is as simple as a tripped circuit breaker. Flip it back on and see if the system starts.<\/li>\n\n\n\n
- Dirty air filter: <\/strong>A clogged filter restricts airflow and can cause your system to overheat or shut down. Replace your filter every 1\u20132 months during heavy use.<\/li>\n<\/ul>\n\n\n\n
When to Call a Pro:<\/p>\n\n\n\n
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- If your system doesn\u2019t turn on even after replacing batteries and checking the breaker.<\/li>\n\n\n\n
- If your AC is blowing warm air despite a correct thermostat setting.<\/li>\n\n\n\n
- If airflow is weak or inconsistent across different rooms.<\/li>\n<\/ul>\n\n\n\n
2. AC Running Constantly<\/h2>\n\n\n\n
In Florida\u2019s humid climate, it\u2019s common for AC systems to run longer to maintain comfort. But if your system never seems to cycle off, that could be a red flag.<\/p>\n\n\n\n
DIY checkups should include checking for blocked vents to make sure all supply and return vents are open and unblocked to allow proper airflow. It\u2019s also important to set a realistic temperature. Setting your thermostat to 65\u00b0F won\u2019t cool your house faster and may just overwork the system.<\/p>\n\n\n\n
Call a pro if the unit runs non-stop and still can\u2019t reach the desired temperature, you could have a refrigerant leak or failing compressor. Excess humidity in the home even with the AC running is another sign of malfunction.<\/p>\n\n\n\n
3. Strange Noises From the AC Unit<\/h2>\n\n\n\n
Rattling, buzzing, grinding, or squealing sounds are never normal. They\u2019re often your AC\u2019s way of telling you something\u2019s wrong.<\/p>\n\n\n\n
DIY checkups should include looking for loose panels or debris. Sometimes it\u2019s just a screw that needs tightening or a branch stuck in the outdoor unit. Call a pro if the noise persists or gets worse, you may have a failing motor, damaged fan blade, or electrical issue that needs immediate attention.<\/p>\n\n\n\n
4. Frozen Coils<\/h2>\n\n\n\n
Frozen evaporator coils can block airflow and shut down your AC system entirely, a common issue in Florida\u2019s humid weather when systems are overworked. DIY checkups should include: <\/p>\n\n\n\n
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- Turning off the AC: Let the system thaw completely.<\/li>\n\n\n\n
- Replacing the air filter: Poor airflow can cause coils to freeze.<\/li>\n\n\n\n
- Opening all vents: Ensure the system is getting enough return air.<\/li>\n<\/ul>\n\n\n\n
Call a pro if coils freeze again after restarting the system, you likely have a more serious airflow issue or a refrigerant problem that requires professional repair.<\/p>\n\n\n\n
5. Bad Odors or Musty Smell<\/h2>\n\n\n\n
Humidity often contributes to mold and mildew buildup in your ducts or on your AC coils. DIY checkups should include replacing filters regularly to reduce musty smells. You can also run a dehumidifier to help manage moisture levels in the home. Call one of our pros if the odor persists or smells like burning, have a technician inspect your system immediately for mold growth or electrical issues.<\/p>\n\n\n\n
- Tripped breaker<\/strong> \u2013 Sometimes the issue is as simple as a tripped circuit breaker. Flip it back on and see if the system starts.<\/li>\n\n\n\n