Why Is My Air Conditioner Not Cooling Properly? Top 10 Reasons & What You Can Do in Nicholasville, KY

There’s nothing more frustrating than turning on your air conditioner during a Kentucky summer — only to find it’s not cooling your home properly. If you’re sweating indoors even though your thermostat is set to “cool,” you’re not alone. Many homeowners in Nicholasville face this issue, especially during heatwaves when systems are pushed to their limits.

At ComfortMaster Heating & Air, we often get calls like, “Why is my AC running but not blowing cold air?” or “Why is my thermostat on 72 but it feels like 85?” This blog will explain the top 10 reasons your AC may not be cooling and what you can do about it.

1. Dirty Air Filters

Problem: Clogged or dirty air filters restrict airflow and make it harder for your system to cool the home.

Solution: Replace filters every 1–3 months, especially during peak usage.

 2. Low Refrigerant Levels

Problem: Refrigerant is the cooling agent in your AC. If your system is low, it may not cool at all.

Solution: You’ll need a licensed HVAC technician to locate the leak and recharge the system. This is not a DIY fix.

 3. Thermostat Issues

Problem: If your thermostat isn’t reading temperatures accurately, your AC may not respond correctly.

Solution: Try changing the batteries or upgrading to a smart thermostat. Also, make sure it’s set to “cool” and not “fan only.”

 4. Blocked or Closed Vents

Problem: Obstructed vents or closed registers can prevent proper cooling in certain rooms.

Solution: Walk through your home and make sure all vents are open and not blocked by furniture or curtains.

 5. Dirty or Blocked Condenser Coils

Problem: The outdoor unit can get clogged with dirt, leaves, or debris, preventing heat from escaping.

Solution: Gently rinse the outdoor unit with a garden hose or call ComfortMaster for a seasonal tune-up.

 6. Frozen Evaporator Coils

Problem: If your AC is running constantly, the coils can freeze, blocking airflow and cooling.

Solution: Turn off the system and let it thaw. Then check for airflow problems or low refrigerant.

7. Electrical Problems or Tripped Breakers

Problem: A blown fuse or tripped breaker can partially shut down your AC, especially the compressor.

Solution: Check your circuit breaker. If the issue keeps happening, call a technician to inspect safely.

 8. Leaky or Poorly Sealed Ductwork

Problem: Cool air might be escaping through holes or loose connections in your ductwork.

Solution: Schedule a duct inspection. We offer duct sealing services throughout Nicholasville and Lexington.

 9. Aging System or Failing Compressor

Problem: If your unit is 10+ years old, the compressor may be losing efficiency or failing altogether.

Solution: If the cost of repair is high, a full system replacement might be more economical. Ask us for a free estimate.

10. Your System Is Too Small for Your Home

Problem: Undersized systems can’t keep up with demand — especially during heatwaves.

Solution: We can perform a load calculation and recommend a properly sized AC unit.

 

 Local Help When Your AC Isn’t Cooling in Nicholasville

If you’ve tried some basic troubleshooting and your air conditioner is still not cooling your home, it’s time to call the pros. At ComfortMaster Heating & Air, we offer:

• Same-day AC repair services
• Emergency diagnostics
• Free second opinions
• Honest pricing — no hidden fees
• Maintenance plans to prevent future issues

FAQ:

“Should I turn off my AC if it’s not cooling?”
Yes, it’s best to turn it off to avoid system damage — especially if coils are frozen or the compressor is struggling.

“How long does it take to fix an AC not cooling?”
Basic repairs like filter changes or thermostat fixes can be done in under an hour. More complex issues like refrigerant leaks may take a few hours.

“Can a clogged filter make AC not cool?”
Absolutely. It’s one of the most common and easiest problems to fix.

“What’s the average AC repair cost in Kentucky?”
Most AC repairs in Nicholasville cost between $150 and $700, depending on the issue.

 

 Ready to Cool Off? Let’s Fix It Today.

Don’t let a malfunctioning AC ruin your summer. Whether you need a quick tune-up or full system repair, ComfortMaster Heating & Air is just a call away.

Address: 51 Wichita Drive, Nicholasville, KY 40356
Phone: (859) 255-0728
Book Your AC Repair Online