Common A/C Problems
11 Common A/C Problems and How to Know When It’s Time to Call a Pro
Keeping your home cool is essential—especially in hot, humid Georgia summers. Unfortunately, air conditioners often fail when you need them the most. In this guide, we break down the most common A/C problems, why they happen, and when to call a certified HVAC technician.
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1. Weak or Warm Airflow
If your A/C is blowing warm or weak air, the most common causes include:
Clogged air filter
Dirty evaporator coils
Low refrigerant
Blower motor issues
Poor airflow is one of the top reasons homeowners schedule AC repair services in Winder, GA.
2. A/C Not Cooling
If your air conditioner runs but doesn’t cool, common reasons include:
Low refrigerant
Frozen coils
Faulty compressor
Blocked condenser
Learn how professional diagnostics work on our Air Conditioning Repair page.
3. A/C Won’t Turn On
If your system won’t start at all, the issue may be:
Thermostat failure
Tripped breaker
Disconnected wiring
Failed capacitor
If basic troubleshooting fails, schedule HVAC repair.
4. Water Leaking From the A/C
Common causes of A/C water leaks include:
Clogged drain line
Damaged drain pan
Frozen coils
Want to prevent future leaks? Check out our AC Maintenance Services.
5. Refrigerant Leaks
Low refrigerant typically means you have a leak. Signs include:
Hissing noises
Ice on refrigerant lines
Poor cooling
High energy bills
Only a certified professional can repair and recharge refrigerant—schedule HVAC service near you if you suspect a leak.
6. Strange Noises From the A/C
Unusual sounds often signal mechanical issues:
Squealing: Belt or blower issues
Banging: Broken parts
Buzzing: Electrical problems
Hissing: Refrigerant leak
If your unit sounds different than usual, call for air conditioner diagnostics.
7. Bad Odors Coming From Vents
Different smells point to different problems:
Musty: Mold in ducts
Burning: Electrical issue
Rotten smell: Dead animal or debris
8. Frozen Evaporator Coils
Frozen coils can be caused by:
Dirty filters
Low refrigerant
Restricted airflow
Blocked return ducts
Learn more about preventing coil issues in our Seasonal HVAC Maintenance Guide.
9. High Indoor Humidity
If the air feels sticky inside, your A/C may be:
Short cycling
Low on refrigerant
Oversized for your home
In need of coil cleaning
Learn more about indoor air quality.
10. Short Cycling (Frequent On/Off)
Short cycling stresses your system and increases your utility bills. It’s often caused by:
Refrigerant issues
Dirty filters
Thermostat problems
Incorrect system size
Let us evaluate your system with a Home Comfort Assessment.
11. High Energy Bills
If your cooling costs suddenly rise, potential causes include:
Inefficient unit
Dirty coils
Leaking ducts
Failing parts
When to Call a Professional HVAC Technician
You should contact a certified technician when:
Your A/C blows warm air
You hear unusual noises
Your system leaks water or refrigerant
The A/C freezes up
Energy bills increase unexpectedly
Our trained HVAC specialists offer AC Repair in Winder, GA and surrounding areas to keep your home cool and comfortable.
