If your AC stops cooling, check that the thermostat is set to Cool with fresh batteries, reset a tripped breaker once, replace a dirty filter, and look for a backed-up condensate drain. If the lines are iced over, turn the system off to thaw. Anything beyond that, including refrigerant or electrical work, needs a licensed HVAC technician.
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Atlanta summers are long, hot, and humid, and an air conditioner here does two jobs: it lowers the temperature and it pulls moisture out of the air. When it fails in July, the house can turn uncomfortable within hours. The good news is that many AC problems are common, well understood, and fixable in a single visit.
Check these before you call
- Thermostat. Confirm it's set to Cool, the setpoint is below room temperature, and the batteries aren't dead. A blank screen often means batteries or a tripped breaker.
- Breakers and switches. Look for a tripped breaker for the outdoor unit and the furnace or air handler, and make sure the service switch near the indoor unit is on. Reset a tripped breaker once; if it trips again, leave it off and call a pro.
- Air filter. A clogged filter can choke airflow, freeze the indoor coil, and cut cooling. Replace it if it's dirty.
- Condensate overflow switch. Many systems have a float switch that shuts the AC off when the drain line backs up. Standing water in the drain pan is a clue.
Common AC problems in Atlanta homes
- Failed capacitor or contactor. If the outdoor fan won't spin or the unit hums without starting, a capacitor is a frequent culprit. These parts wear out under heat and are routine repairs.
- Clogged condensate drain. Humid air means a lot of water running through the drain line, and algae and sludge can build up. A backed-up line can shut the system down or leak through a ceiling when the air handler is in the attic.
- Frozen evaporator coil. Ice on the copper lines or indoor coil usually points to low airflow (dirty filter, blocked returns, a failing blower) or low refrigerant. Turn the system off and let it thaw before a technician arrives.
- Refrigerant leaks. An AC doesn't use up refrigerant. If it's low, there's a leak, and topping it off without finding the leak is a short-term fix.
- Dirty outdoor coil. Pollen, cottonwood fluff, grass clippings, and leaves can coat the condenser and make it work harder on the hottest days.
What a good service call looks like
A technician should check electrical components, measure temperatures and refrigerant pressures, inspect the coils and drain, and explain what failed and why. Ask for the diagnosis and the price in writing before work starts, and ask whether the part or repair carries a warranty. If the system is older and the repair is major, it's reasonable to ask for a replacement quote at the same time so you can compare.
If you have to wait
- Close blinds and curtains on sun-facing windows.
- Run ceiling fans and portable fans; they help you feel cooler even without AC.
- Avoid using the oven and dryer during the hottest part of the day.
- Check on older relatives, infants, and pets, who are most vulnerable to heat.
When you're ready, request an HVAC contractor and we'll pass your details to an independent, licensed company near you.
Frequently asked questions
Why is my AC running but blowing warm air?
Common causes include a failed capacitor or contactor that keeps the outdoor unit from running, low refrigerant from a leak, a dirty outdoor coil, or a frozen indoor coil from low airflow. Check the filter and breaker, then call a technician.
Why is there ice on my AC lines?
Ice usually means low airflow (a dirty filter, blocked returns, or a blower problem) or low refrigerant. Turn the cooling off and run only the fan, or turn the system off, until it thaws, then have a technician find the cause.
How much does AC repair cost in Atlanta?
It depends on the part and the system. Simple repairs like a capacitor or drain cleaning can be relatively modest, while compressor or coil replacements can be expensive enough to justify comparing a replacement quote. Ask for a written price before work starts.