Why Your AC Isn't Cooling
Nine times out of ten it's one of these. If you are experiencing an AC not cooling in Atlanta, the humidity and long cooling season wear out capacitors, coils and refrigerant charge faster than the national average.
Identify Symptoms
Recognize common signs like warm air, strange noises, or water leaks on our symptoms guide.
Repair or Replace
Evaluate whether repairing components or replacing your AC unit is the best path forward.
Estimate Costs
Get clear pricing insights for DIY repairs versus professional HVAC technician services.
The 10 causes behind almost every AC failure
Identify your system symptoms quickly. We break down the most frequent failures to help you decide on the right fix.
Low Refrigerant
Symptoms it causes:
- Warm air blowing from vents
- Hissing noise near evaporator coils
- Ice on refrigerant copper lines
How to spot it:
Look for ice formation or frost buildup on the outdoor unit's brass service valves.
Bad Capacitor
Symptoms it causes:
- Outdoor unit hums but fan won't spin
- Unit clicks repeatedly on startup
- Hard starting compressor
How to spot it:
The run capacitor inside the electrical panel appears swollen, bulged, or is leaking fluid.
Dirty Condenser Coil
Symptoms it causes:
- Reduced cooling efficiency
- High monthly energy bills
- System frequent short-cycling
How to spot it:
Outdoor unit metal fins are visibly coated with grass clippings, pollen, mud, or debris.
Bad Compressor
Symptoms it causes:
- Outdoor unit fails to start
- Loud metallic grinding or clanking sound
- Tripped main electrical breaker
How to spot it:
Outdoor cabinet is hot to the touch with no air movement or compressor motor vibration.
Clogged Air Filter
Symptoms it causes:
- Weak airflow from supply vents
- Warm room temperatures
- Ice on indoor evaporator coil
How to spot it:
Remove the air return intake filter — if it is gray, dense, and dust-coated, airflow is choked.
Faulty Thermostat
Symptoms it causes:
- Thermostat screen is blank
- AC won't trigger cooling cycle
- Incorrect temperature readings
How to spot it:
Replace batteries or set cooling target 5° lower than ambient with zero response from the unit.
Blocked Condensate Drain
Symptoms it causes:
- Water pooling around indoor unit
- Drain pan overflowing
- Automatic AC emergency shut-off
How to spot it:
Standing water in the emergency overflow pan or safety float switch triggered at air handler.
Failed Blower Motor
Symptoms it causes:
- No air exiting supply vents
- Burning smell near indoor air handler
- Loud squealing noise
How to spot it:
Thermostat calls for cool, outdoor compressor runs, but zero airflow comes through house registers.
Tripped Breaker / Electrical Fault
Symptoms it causes:
- Total loss of AC power
- Blank thermostat
- Zero response from indoor and outdoor units
How to spot it:
Check main house electrical panel for double-pole AC breakers resting in center or OFF position.
Leaky Ductwork
Symptoms it causes:
- Uneven cooling between rooms
- Excessive dust in living spaces
- Unusually high power bills
How to spot it:
Inspect accessible attic or crawlspace duct runs for detached joints, tears, or peeling tape.
Atlanta AC Not Cooling?
Call us at 470-847-9076.
Get Your Atlanta AC Running Cool Again Today
Diagnose cooling failure, evaluate repair versus replacement costs, and connect with certified local technicians ready to resolve your AC system issues fast.