Reasons Your AC Isn't Blowing Cold Air
June17, 2025
If your air conditioner is running but your home still feels warm, you’re not alone. Many homeowners in the Myrtle Beach area face this frustrating issue every summer. Before you call a professional, there are a few common problems that could be causing your AC not to blow cold air. Here's a breakdown of the top 10 reasons — and which ones you might be able to fix yourself.
The capacitor is like a battery that jump-starts your AC unit. If it fails, the system won’t start properly. Capacitors are housed behind a panel on your AC unit and should only be tested and replaced with the power off.
AC units have fuses in the disconnect box outside your home. A blown fuse could prevent your unit from operating. Check and replace any damaged fuses with the correct amperage for your system.
If your AC fan motor goes bad, the fan blades won't spin to push hot air out and draw cold air in. This motor is located inside your condenser unit and may need to be professionally replaced.
Over time, condenser coils can become clogged with dirt, leaves, or pine needles. Clean your coils at least twice a year using a garden hose and coil cleaner to ensure efficient cooling.
If your evaporator coils inside the air handler are dirty, your AC won’t be able to cool air properly. These coils can be hard to reach and may require a technician to clean safely and thoroughly.
Low refrigerant is often caused by leaks and must be addressed by a licensed HVAC technician. If your system isn’t cooling like it used to, it could be time for a refrigerant refill and a leak inspection.
If there are leaks in your ducts—especially in the attic—you could be losing cool air before it reaches your living spaces. Check for gaps or disconnections in your ductwork and seal them with proper HVAC tape.
The compressor is the heart of your AC system. If it seizes or fails, your unit won't cool at all. Replacing a compressor is a complex job and should be handled by a professional.
Finally, don’t forget to check your thermostat. Dead batteries, wiring issues, or outdated hardware can all affect performance. If your thermostat is more than 10 years old, it may be time to upgrade.
If you’ve gone through this list and your AC still isn’t cooling properly, it’s time to bring in the pros. At Montgomery's Coastal Cool, we specialize in diagnosing and repairing all types of AC issues throughout Myrtle Beach and the surrounding areas. Whether it's a capacitor replacement, refrigerant recharge, ductwork repair, or even air duct cleaning — we’ve got you covered.
📞 Call us today at (843) 698-2739 or schedule your service online for fast, affordable HVAC solutions you can trust.
1. You're Hearing the Wrong Fan
Sometimes, the fan you hear isn’t your outdoor AC condenser—it’s the indoor furnace or air handler. Head outside and check if your outdoor AC unit is actually running. If it’s off while the indoor system is blowing air, you're just recirculating warm air.
2. Faulty Capacitor
The capacitor is like a battery that jump-starts your AC unit. If it fails, the system won’t start properly. Capacitors are housed behind a panel on your AC unit and should only be tested and replaced with the power off.
3. Blown Fuses
AC units have fuses in the disconnect box outside your home. A blown fuse could prevent your unit from operating. Check and replace any damaged fuses with the correct amperage for your system.
4. Broken Fan Motor
If your AC fan motor goes bad, the fan blades won't spin to push hot air out and draw cold air in. This motor is located inside your condenser unit and may need to be professionally replaced.
5. Dirty Condenser Coils
Over time, condenser coils can become clogged with dirt, leaves, or pine needles. Clean your coils at least twice a year using a garden hose and coil cleaner to ensure efficient cooling.
6. Dirty or Blocked Evaporator Coils
If your evaporator coils inside the air handler are dirty, your AC won’t be able to cool air properly. These coils can be hard to reach and may require a technician to clean safely and thoroughly.
7. Low Refrigerant Levels
Low refrigerant is often caused by leaks and must be addressed by a licensed HVAC technician. If your system isn’t cooling like it used to, it could be time for a refrigerant refill and a leak inspection.
8. Leaky or Disconnected Ductwork
If there are leaks in your ducts—especially in the attic—you could be losing cool air before it reaches your living spaces. Check for gaps or disconnections in your ductwork and seal them with proper HVAC tape.
9. Locked-Up Compressor
The compressor is the heart of your AC system. If it seizes or fails, your unit won't cool at all. Replacing a compressor is a complex job and should be handled by a professional.
10. Malfunctioning Thermostat
Finally, don’t forget to check your thermostat. Dead batteries, wiring issues, or outdated hardware can all affect performance. If your thermostat is more than 10 years old, it may be time to upgrade.
🔧 Still Not Blowing Cold Air? Call Your Myrtle Beach AC Experts
If you’ve gone through this list and your AC still isn’t cooling properly, it’s time to bring in the pros. At Montgomery's Coastal Cool, we specialize in diagnosing and repairing all types of AC issues throughout Myrtle Beach and the surrounding areas. Whether it's a capacitor replacement, refrigerant recharge, ductwork repair, or even air duct cleaning — we’ve got you covered.📞 Call us today at (843) 698-2739 or schedule your service online for fast, affordable HVAC solutions you can trust.