Why Is Your Air Conditioner Not Blowing Cold Air?
It doesn’t get much worse than an air conditioner that doesn’t want to blow cold air in the middle of the sweltering hot summer. No matter how hard you bang, punch, or kick it, your AC won’t magically come to life and be fixed in short order. A faulty AC can occur for many reasons, so if you want to know how to fix an AC not blowing cold air, it’s a good idea to consider a few of these common reasons.
Incorrect Thermostat Setting
An air conditioner not blowing cold air can simply result from an incorrectly set thermostat. This is especially common during seasonal temperature changes. You might not have switched the thermostat from heating to cooling, or someone at home may have changed the temperature setting.
Either way, fixing an AC not blowing cold air can be as simple as checking your thermostat, so make sure all the settings are correct before moving on to the next possible issue — your air filter.
Clogged Filter
A clogged filter is one of the most common reasons why your air conditioner is not blowing cold air. In fact, a host of other AC problems can arise from a dirty filter.
Some air conditioning units turn off when the filter is clogged enough to restrict airflow. Your first step to fixing an AC not blowing cold air should be to check and change your air filter. Filters should be replaced every 30-90 days — make a note for yourself so you don’t forget.
Low/Leaking Refrigerant
Low or leaking refrigerant is another common issue preventing your AC from cooling your home. A lack of adequate refrigerant leads to ice buildup in your AC, which in turn can result in system failure if not caught and repaired on time.
Refrigerant doesn’t run out, so if you have low refrigerant levels, you should contact an HVAC professional to fix the problem.
Condenser or Evaporator Problems
If your air conditioner is not blowing cold air, a blocked condenser unit might be the root cause of your issues. Condensers bring air towards the condenser coils, but when dirt and debris get stuck within, condensers operate at lower efficiency and work extra hard to circulate air in your home.
Evaporator coils absorb heat from the indoors and are essential to the cooling process that begins in your home. Naturally, the moisture content means your evaporator is prone to mildew and mold buildup. This not only leads to an air conditioner not blowing cold air but also a system that blows inefficient, smelly, and unhealthy air into your home.
Ductwork Damage
Occasionally, rodents can end up in your ductwork and bite holes in the air ducts that cause your airflow to be restricted and reduced. Tears in your ductwork can also occur over time and cause you to lose air, making your AC system work harder for a benefit you might not feel. You’ll eventually turn down your thermostat to compensate, and all that does is wear out your system over time. Calling an air conditioning maintenance expert to examine your ductwork should be one of your first steps to fixing an AC not blowing cold air.
Malfunctioning Blower Fan
You might hear your AC unit running but not blowing air from the vents. This usually means the blower motor has failed or a relay has stopped working. Without that blower, even perfectly cold air can’t get pushed through the house.
Improperly-Sized AC Unit
An undersized unit will run constantly but never cool the house effectively. On the flip side, an oversized one might short cycle, turning on and off quickly without ever running long enough to properly cool the space. If your AC unit isn’t getting cold enough, it could be because it was never the right size for your home in the first place.
Electrical Issues
Sometimes, the reason your home AC is not blowing cold air is because the system isn’t fully powered. A tripped circuit breaker, blown fuse, or faulty capacitor can interrupt how the system functions. Don’t ignore flickering power or strange noises — those are red flags. If you’re dealing with persistent electrical issues, reach out to a professional for assistance right away.
Excessive Humidity
In Georgia, the humidity can be brutal. High indoor humidity makes the air feel warmer, even if your AC is working. If your home feels sticky and it seems like the AC unit isn’t blowing cold air, it might be due to moisture control problems. You may need to invest in a dehumidifier.
Aging System
Air conditioners don’t last forever. If your system is between ten and 15 years old, wear and tear might be the reason your AC unit isn’t getting cold enough anymore. At this point, replacement might be smarter than repair.
Do you think it’s time to upgrade? Gagne Heating & Air Conditioning offers professional AC installation in Alpharetta, GA, and the surrounding areas, so don’t hesitate to call us for help.
Why Gagne Heating & Air Conditioning Is Worth Calling
If your AC unit isn’t blowing cold air, and you’ve already checked your thermostat, swapped out the air filter, and peeked at the outdoor unit, this is the part where Gagne Heating & Air Conditioning can step in and make a difference.
Gagne isn’t just here to fix what’s broken. Our team is trained to look at the big picture. That means spotting hidden leaks, checking refrigerant pressure, identifying airflow problems, and preventing things like frozen coils or worn-out capacitors before they shut your system down completely. We provide the kind of care that can help you avoid major AC breakdowns and bigger repair bills down the road.
What You Should Remember
If your AC unit isn’t blowing cold air, it can be frustrating, but there’s almost always a fix. From dirty air filters and thermostat settings to refrigerant leaks and failing compressors, there are many reasons your system might be struggling. Some issues are simple DIY fixes, while others — like electrical problems, frozen coils, or worn-out components — need professional attention.
Staying on top of maintenance, being aware of airflow issues, and calling Gagne Heating & Air Conditioning when something feels off can save you time, money, and a lot of sweaty afternoons. We stay current with all things air conditioning in Alpharetta, so our advice is always grounded in what works best for homes like yours in Georgia’s heat and humidity.
Proper Maintenance Can Bring Your Air Conditioner Back to Life
Fortunately, an air conditioner not blowing cold air isn’t the end of the world. You can take many steps to restore your air conditioner, but the best thing you can do is reach out to HVAC professionals like Gagne Heating & Air Conditioning.
Our experience with all things heating and cooling is exactly what you need to keep the cool air flowing through your AC unit. Contact us today and schedule an air conditioning repair service you’re sure to love.
We serve Cummings, Doraville, Dunwoody, Johns Creek, Canton, and several other areas throughout the greater Alpharetta area.