My AC Is Not Cooling

If your AC is running but not cooling, the most common causes are a dirty air filter, low refrigerant, a frozen coil, or a failing compressor. An HVAC technician can diagnose and fix the issue.

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What to Do Right Now

AC is running but the house won't cool below 80 degrees, or warm air is coming from the vents.

Check and replace your air filter if it's dirty
Check the outdoor unit — make sure it's running and the area around it is clear
Check if the indoor coil is frozen (ice on the copper lines)
Set the thermostat to "auto" and raise the temperature a few degrees

What Not to Do

✗Don't keep running the AC if the coil is frozen — it can damage the compressor
✗Don't add refrigerant without finding and fixing the leak

When to Call a Professional

Call an HVAC professional if the filter is clean and the system still won't cool, if you hear unusual noises, or if the outdoor unit isn't running at all.

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Learn more about what causes this problem, how water travels through structures, and what to expect from the repair process.

FAQ

My AC Is Not Cooling — Questions

Florida's humidity causes more condensation on the evaporator coil. A dirty filter or low refrigerant restricts airflow, causing the coil to drop below freezing and ice to form. Turn off the system and let it thaw before calling a pro.