Why Is My AC Not Cooling? — Miami Homeowner's Guide
7 Common Causes · DIY Checks · When to Call a Pro
Your AC is running but the house isn't cooling down. In Miami's heat, this is more than an inconvenience — it's a health risk. Here are the 7 most common reasons an AC stops cooling and what you can do about each one.
What To Do Right Now
Check the air filter
A clogged air filter is the #1 cause of poor AC performance. Check your filter — if it's gray and dirty, replace it with a new one. Filters should be changed every 1–3 months in Miami.
Check the thermostat
Make sure the thermostat is set to COOL (not FAN), and the set temperature is below the current room temperature. Try replacing the batteries if the display is dim.
Call us if it persists
If the filter is clean and the thermostat is correct but the AC still isn't cooling, call (305) 331-3366. The problem likely requires a licensed HVAC technician.
Frequently Asked Questions
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