AC Not Cooling? 7 Things to Check Before You Call a Pro

When the AC stops cooling, the problem isn't always a broken compressor. Run through these checks first — a couple of them you can fix yourself in minutes.

• Thermostat: make sure it's set to COOL and a few degrees below room temperature. Swap the batteries while you're there.
• Air filter: a clogged filter chokes airflow and is the #1 cause of weak cooling. Replace it if it's gray.
• Circuit breaker: check that the AC breaker hasn't tripped. Reset it once — if it trips again, stop and call a pro.
• Outdoor unit: clear leaves, grass, and debris from around the condenser and gently hose off the fins.
• Vents and registers: make sure supply vents are open and not blocked by furniture or rugs.
• Frozen coil: if you see ice on the refrigerant lines, turn the system off and let it thaw — this often points to airflow or refrigerant issues.
• Condensate drain: a full drain pan can trigger a safety shutoff on many systems.

When to call an HVAC pro

If the basics check out and you still have warm air — or you hear grinding, smell something burning, or the unit short-cycles on and off — it's time for a professional. Low refrigerant, a failing capacitor, or a bad compressor all need licensed hands.

Same-day HVAC help is available in most areas. Describe the symptoms once and get matched with local pros who can quote the fix.