AC Not Cooling? 6 Quick Checks Before You Call for Service

Before you assume the worst, a few quick checks can rule out the most common (and cheapest to fix) reasons an air conditioner stops cooling properly.

Start with the thermostat: confirm it's set to 'cool' and the target temperature is actually below the room temperature. Next, check the air filter — a clogged filter restricts airflow and is one of the most common causes of a weak-feeling AC. If it's visibly dirty, replace it.

Outside, make sure the condenser unit isn't blocked by leaves, grass clippings or overgrown plants — restricted airflow around the outdoor unit reduces cooling capacity significantly. Inside, check that all supply vents are open and unblocked by furniture or rugs.

If your breaker panel shows a tripped breaker for the AC circuit, don't keep resetting it — repeated trips usually mean an underlying electrical issue that needs a technician. And if you notice ice forming on the refrigerant lines, turn the system off entirely; running it iced up can damage the compressor.

If you've checked all of the above and it's still not cooling properly, it's time to call — you'll also be able to tell our technician what you've already ruled out, which speeds up the diagnosis.