AC Not Cooling in Woodstock, GA? 7 Things to Check Before Calling an HVAC Tech

If your air conditioner is running but blowing warm air in Woodstock, Canton, Acworth, or anywhere across Cherokee and Cobb counties, don't panic — and don't keep the system running. About one-in-three "AC not cooling" calls we run at Little River Mechanical are problems homeowners could have caught (or even fixed) in five minutes. Here's the exact diagnostic checklist our techs walk before they ever pull out a manifold gauge.

1. Check the thermostat — really check it

Sounds obvious. Half the "broken AC" calls in Woodstock end here. Make sure the thermostat is set to COOL, the setpoint is at least 3°F below room temperature, and the fan is set to AUTO, not ON. If your screen is blank, replace the batteries before anything else.

2. Look at your air filter

A clogged 1-inch filter is the #1 cause of frozen evaporator coils across metro Atlanta. If your filter looks gray or you can't see light through it, swap it. Then turn the system off for 2–4 hours to let any ice on the indoor coil melt before restarting.

3. Check both breakers

Central AC has two breakers — one for the indoor air handler, one for the outdoor condenser. A tripped outdoor breaker is the most common reason the outside unit isn't running on a hot Georgia afternoon. Flip it fully off, then back on.

4. Look at the outdoor unit

Walk outside. Is the fan on top of the condenser spinning? If not, that's usually a bad capacitor — a $200–$350 repair we can knock out same-day across Cherokee and Cobb County. If the fan is spinning but warm air is blowing out the top, you may be low on refrigerant.

5. Check the condensate drain line

Georgia humidity means your AC pulls a lot of water out of the air. A clogged condensate line trips the safety float switch and shuts the whole system down. Look for the PVC pipe near your indoor unit — a wet/dry vac on the outdoor end clears most clogs.

6. Clear the outdoor coil

Pollen, grass clippings, and cottonwood seeds choke the outdoor coil every spring. Kill power at the breaker, then gently rinse the coil with a garden hose from the inside out. Don't use a pressure washer — it'll bend the fins.

7. Listen for the click

If you hear a rapid clicking but the compressor never starts, that's almost always a hard-start kit or contactor problem. Don't keep cycling it — repeated start attempts can burn out the compressor, turning a $250 repair into a $5,500 system replacement.

When to call a pro

If you've worked through this list and the house is still hot, give us a call. We're at (770) 363-8489, open daily 9am–5pm, and most days we can get a licensed tech to your door within 1–2 hours. Flat-rate pricing, no diagnostic upsells, and the service fee is waived if you move forward with the repair.

Related reading

• How often should you replace your HVAC filter in Georgia?
• How much does a new AC unit cost in Cherokee County, GA?
• Heat pump vs. gas furnace in North Georgia