Is your air conditioner running, but your home still feels warm? Don’t sweat it, literally. AC issues are common in South Florida, especially during the summer, but many are preventable or easy to fix with the right guidance. Here are 10 possible reasons your AC isn’t cooling properly and how to fix it:
- Dirty air filters
clogged filters block airflow, forcing your unit to work harder. This reduces efficiency and can cause uneven cooling or total shutdowns. Replace them every 1–3 months. - Incorrect thermostat settings
a thermostat accidentally set to “fan” instead of “cool” will circulate air without lowering the temperature. Check settings and consider upgrading to a smart thermostat for better control. - Refrigerant leaks
low refrigerant levels mean your system can’t absorb and remove heat properly. This is a serious issue that requires professional repair and proper recharging. - Blocked condenser unit
if your outside unit is surrounded by leaves, dirt, or debris, it can’t release heat effectively. Keep at least 2 feet of clearance and schedule regular cleanings. - Faulty capacitors or relays
these small components help start the motors. If they fail, your unit may hum but won’t cool. Electrical testing is needed to diagnose and replace them. - Frozen evaporator coils
poor airflow or low refrigerant can cause coils to freeze, stopping the cooling cycle. This often shows up as warm air from vents or visible frost. - Leaky ducts
air ducts with cracks or gaps leak cool air into walls or unconditioned spaces, reducing comfort and increasing bills. A duct inspection can pinpoint the problem. - Aging equipment
units over 10–15 years old lose efficiency and struggle to cool consistently, even if they seem to be working. Consider a modern, energy-efficient replacement. - Improperly sized ac system
bigger isn’t always better. An oversized unit cools too quickly without removing humidity, while an undersized one will never fully cool your space. Professional load calculations are key. - Neglected maintenance
Skipping annual tune-ups leads to wear and tear, reduced efficiency, and early breakdowns. Regular maintenance is the most cost-effective way to keep your AC in top shape.
Need help fast? AC Tech Cooling Services is your trusted HVAC expert across Miami-Dade and beyond, from West Palm Beach to Homestead.
Contact us at (786) 894-8176 |6700 NW 77th Ct, Suite 213, Miami, FL| actechcooling.com
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