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Why Your Air Conditioner Blows Hot Air


Article by Jason Fraser

Photography by Laurie Fraser

It’s the beginning of another sizzling North Texas summer, and all you want to do is cool off inside your beautiful home. But as soon as you kick off your shoes and ease back into the recliner, you notice that your air conditioner is blowing hot air through the vents. When you left, the thermostat was set at a cool 72 degrees. Now, your living room feels like the surface of the sun.


The last thing Lantana, TX, homeowners want is to discover their air conditioner is on the fritz. Sadly, this is a common struggle during the summer and can start as early as April as outside temperatures begin to climb for the first time in months. Needless to say, a working system is a must. So let’s look at a few common reasons why your air conditioner is blowing hot air and if it’s time to schedule AC repair with a local air conditioning contractor.


Why Is Your Air Conditioner Blowing Hot Air? It Could Be One of these 8 Reasons


1. The thermostat is set wrong — Kids can bump into the thermostat and accidentally turn it off, switch the settings to heat, or push the set temperature a little higher than you prefer. Maybe you accidentally bumped into it. The point is that the fix to all that hot air blowing from the vents might be as simple as pushing a few buttons.


2. A tripped breaker — If hot air is coming from your vents, but the outdoor HVAC unit isn’t running, it’s possible that a power outage or surge tripped the breaker and caused the outdoor unit to lose power. All you have to do is go to your breaker box, find the tripped breaker, and switch it back to the “on” position. Your AC should return to normal in a few minutes.


3. The outdoor unit is obstructed — Overgrown landscaping, dirt, leaves, and debris suffocate an outdoor air conditioner unit. A key to proper preventative maintenance is to always clean in and around the AC unit so that it works smarter instead of harder.


4. Clogged air filters — Air filters remove dust, dirt, pollen, pet dander, and other particles to keep your home’s air clean and safe to breathe. They also ensure that critical airflow cycles to and from your air conditioner to keep your home comfortable year-round. Clogged air filters force the unit to work significantly harder and can lead to other problems, such as hot air. Most air filter manufacturers like General Electric, Filtrete, HEPA, and Honeywell and HVAC companies recommend changing your air filter every three months. But a lot of that depends on the size and quality of your air filter.


5. Refrigerant leak — Another reason why your air conditioner is blowing hot air could be that it is low on refrigerant or has a refrigerant leak. If this is the case, it’s time to search “AC repair near me.” Refrigerant is an internal liquid that aids your AC unit in blowing cold air. Without it, you’ll only get hot air. An easy way to spot low refrigerant is if you’re not getting any cold air inside your home and the coils on the outdoor unit are frozen.


6. Dirty evaporator coils or clogged condensate line — Just like your AC air filter, your system’s evaporator coils and condensate line can become dirty and clogged over time. This restricts their ability to cool the air inside your home properly and remove humid air, hence the reason why you’re getting hot air instead.


7. Bad compressor — A compressor is the heartbeat of your air conditioner. So if it’s not working properly, the odds are high that you won’t have any hot air blowing from your vents. A skilled HVAC contractor can properly diagnose whether or not you have a bad compressor and can guide you on any next steps.


8. Duct leak — Leaks in your home’s ductwork are an extreme example of why an air conditioner might be blowing hot air. In these situations, there is a hole somewhere in the ductwork that’s supplying cold air throughout your home. The hole allows for cold air to mix with warm air outside the duct, leading to hot air blowing from your vents.


Call A&A Air in Lantana, TX, Today to Help Solve Why Your Air Conditioner Is Blowing Hot Air.


It can be frustrating when your air conditioner is on the fritz. It’s even more alarming when you know that HVAC companies in Lantana and surrounding communities are a dime a dozen but are often too busy to schedule your service call quickly. At A&A Air, we take your family’s comfort seriously. We know our job inside and out and respond promptly.

 All you need to do is give us a call today!

 We proudly serve Lantana, TX, and surrounding areas. You can email us at or call 972-951-1320.