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Why Is My AC Blowing Hot Air in My House?

Summer heat is serious, and no doubt, air conditioning is the most crucial thing for anyone who wants to stay cool and comfortable. However, it sometimes starts to acts up, and the worst situation happens: the AC, which is meant to cool your house, starts blowing hot air in your home instead. The last thing anyone wants to ask in summer is, “Why is my AC Blowing hot air in my house?”

There are a lot of variables when it comes to your AC malfunctioning. While some are simple and easy to figure out, others are complex and can be expensive. To understand it better, you first need to understand two things. The first one is how people often neglect HVAC maintenance that leads to the systems failing, and the second is top problems on why an AC system might break.

Note: If you’re a complete novice in these issues, it might be better for you to call an HVAC company like us here at Absolute Airflow to take a look at your AC system and solve the problem quickly.

AC Tune Up In Westminster, Garden Grove, Fountain Valley, CA and Surrounding Areas

Common Reasons Why Your AC May Blow Hot Air

Many people often neglect maintenance on their HVAC system, which eventually leads to the systems failing. These are some of the six more common consequences that you might face if you neglect AC maintenance:

  • Poor indoor air quality.
  • Higher cooling expenses.
  • The shorter life span of an air conditioner.
  • More repairs and replacements.
  • Poor reliability throughout the summer.

Now that we’ve seen the consequences of neglecting AC maintenance let’s head on to the top problems on why AC may sometimes break.

1. The Thermostat on the Wrong Setting

You’ll want to make sure to check your thermostat settings. You should do this because the thermostat’s fan settings control the fan in your AC unit.

Check that if you or someone may have accidentally bumped onto the thermostat and changed the settings to “heat.” In that case, you want to change the settings back to “cool.”

You should also double-check that the fan is set to “auto” rather than “on.” It’s necessary to set it to auto because it only uses the fan when the air is heated or cooled. If you choose the “on” option, the fan will run continuously, even if the air conditioner is not turned on, which will result in warm air coming inside your house.

2. The Air Filter Is Dirty

A dirty air filter eventually leads to a dirty evaporator coil. This evaporator coil, which gets filled with dust and debris, cannot get enough airflow for proper cooling operation.

It is recommended that air filters should be replaced every 30-60 days. Of course, it also depends on the type of air filter, the environment, and the household. This is something that a lot of HVAC companies provide. You can also set up monthly reminders to check the state of your air filters.

One method to check is to pass light through the air filter. If the light barely passes through it when you hold it up, then it’s probably overdue for replacement.

3. Check Your Circuit Breaker or Electrical Panel

Usually, air conditioners have two circuit breakers, one for the inside unit and another for the outside. In the case of AC blowing hot air in your house, you have to check the outside circuit. This is because if the outer circuit is broken, then your AC will continue to blow hot air inside your house.

What Can Cause A Furnace To Stop Working?

You have to make sure your HVAC system has power by checking the electrical panel. Since HVAC units need a considerable amount of energy to run, the circuit breaker may shut off automatically if there’s too much power demand. This is mean to be a safety precaution.

One more important thing to note in this case is if the circuit breaker was tripped or your AC unit blew a fuse, then professional help may be necessary.

4. Leak in the Refrigerant

Air conditioners cool the home’s air by removing the heat from the inside and dumping the heat outside. It does this with the help of refrigerants. But when your air conditioner system is low on refrigerant, then your air conditioner won’t be able to move heat out of your home successfully. This means that the air coming through the vents will usually be warmer than usual.

Some signs of the system being low on refrigerant are:

  • Frozen refrigerant. You can check your outside unit and see if the refrigerant is frozen or not.
  • The air conditioner blows hot air during the day but blows out cold air at night.
  • You might hear bubbling noise near the AC (which represents a leak in the refrigerant). If you think that this is the problem, then you should schedule a professionals AC repair.

These are just a handful of common problems discussed here in this article. The best thing you can do for your sanity — and your air conditioner’s health — is to set up regular maintenance with us here at Absolute Airflow.

Regular checkups will remove almost all of these problems with your AC and will give you much better peace of mind, ensuring you can get the full benefits of an air conditioner. To learn more about how our AC repair services can help you, please contact us today!

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Customer Reviews

Claudia M.

Scott, along with his associate, Gabe, did a great job. They were both professional and friendly. Scott explained in enough detail to help me understand how my a/c unit works-he’s very informative. Have was a great help, cutting the time it took to clean and install the HVAC equipment. I liked that they were both pet friendly, that’s also important for me. I’ve been a customer of absolute Airflow for a couple of years and they are a great company …

Ty S.

Have had nothing but amazing experiences with Absolute Airflow from the beginning. We have had a few issues here and there but Absolute has always sent someone out quickly and stood behind their work. Most recently they sent out Spencer and he was the best technician we’ve ever had! He was extremely respectful and polite, he also took the time to thoroughly talk me through and help me understand the genesis of our various issues we were encountering. Definitely hope …

Ian S.

My requested service was set up by Marcus who came to my home to evaluate and was prepared with options and great prices for my water heater replacement. Was able to get an appointment within 3 days as there was no emergency. My install tech James was amazing, He was very respectful and maintained a clean and organized work area as the installation was in the home. The removal, prep, and installation of new water, gas, and venting took approximately …

Richard S.

I can’t express enough how impressed I am with this company and especially Anthony Belt. Anthony was so thorough and patient with my wife and me. The impressive part was he was able not only to identify all the problems with my heating and ac but went above and beyond to fix all of them! My electrical bills were over $500 a month during the ac months and now they are less than $200! Not only am I saving a …

Patrick K.

I haven’t posted any reviews in a long while but here I am thanks to SCOTT with Absolute Airflow. The warmer Cali weather is around the corner and as a responsible homeowner, I decided to get my HVAC system checked out and tuned up before the summer heat. Scott provided us with the full red carpet experience. His knowledge, quality and care put into his work, and professionalism were all outstanding. Replaced fan motor due to oil leak (a normal …

Liem H.

Outstanding experience from the start. I’ve been a member of Absolute Airflow for almost 2 years now. Since then, I’ve had my system maintained twice a year. Every service has been very thorough and professional. Each time, everything was explained to me in terms that I would understand, coupled with plenty of photo documentation. Which I appreciate so much. Knowing that I would have to replace my aging system. I dreaded the coming expense and experience. But my fears were …