What To Do If Your Air Conditioner Blows Out Warm Air

As the heat picks up, one of the last things a homeowner wants is for their air conditioner to blow out warm air. Luckily, there are a few steps you can take to determine the cause and prevent the problem from happening again. Learn the basics of what to do if your air conditioner blows out warm air so that you can stay cool all summer long.

What To Do If Your Air Conditioner Blows Out Warm Air

Following the steps below can help prevent your air conditioner from blowing out warm air this summer. Remember that regular maintenance is key to ensuring that your AC unit runs efficiently for years to come. It is also important to call a professional like Liberty Plumbing, Heating And Air Conditioning if you encounter any issues with your air conditioner. We can help diagnose the problem and recommend a solution that is best suited to your needs.

Check The Thermostat

One of the first steps to take when your air conditioner is blowing out warm air is to check the thermostat settings. Make sure that it is set to “cool” and the temperature is set lower than the current room temperature. If these are already correct, then you can move on to other possible causes of the problem.

Check The Air Filter

If the thermostat is set correctly, then you should check the air filter of your unit. Dirty or clogged air filters can cause your air conditioner to work inefficiently, resulting in warm air coming out. Make sure to clean or replace the air filter regularly for the best results. While most experts recommend changing it every three months, this may need to be done more often in households with pets or allergies.

Check The Breaker Switch

A tripped circuit breaker can also be to blame for a malfunctioning air conditioner. Check the breaker switch and make sure that it is in the “on” position. If this does not fix the problem, you may have a more serious issue with your unit and should call an HVAC technician for assistance.

Check The Outdoor Unit

Ice buildup on the outside condenser unit can also cause warm air to blow out of your AC. Make sure to clear away any debris or grass clippings that may be blocking the unit, and then turn off the system and allow it to thaw completely. If you try to break up the ice manually, you could damage the unit. This process can take up to a few hours. You may need assistance from an HVAC technician if there is a more serious malfunction with the unit.

Apart from ice, debris, dust, and grass clippings can also prevent the flow of air. Ensure that there are no obstructions in or around the unit to ensure that it is working properly. Get a stiff brush and clean the outdoor unit regularly to avoid such problems. For long-term effects, trim any bushes or tree branches that may be blocking the flow of air.

Check The Coils

For your air conditioner to function properly, the evaporator and condenser coils need to be in good condition. They need to be able to absorb and emit thermal energy. If these components become dirty or damaged, it can result in your AC not cooling effectively. The evaporator coil should be regularly inspected for dirt buildup and cleaned if necessary. A professional HVAC technician will have the tools and expertise to thoroughly clean the coils from any dust or debris.

Check The Refrigerant Levels

Another possible cause of your air conditioner blowing out warm air is low refrigerant levels. There is a minimum amount of refrigerant that should flow through your AC unit. It is necessary for the coils and compressor to perform their functions. Low refrigerant, usually due to leaks, can cause the unit to run inefficiently, resulting in warm air instead of cool. If this is the case, you will need to call a professional HVAC technician to inspect and recharge your system. Do not attempt to do this yourself.

Contact a Profession HVAC Technician

By following these simple steps, you can determine what is causing your air conditioner to blow out warm air and take steps toward fixing it. If all else fails, be sure to call an HVAC technician for professional assistance. They can inspect your air conditioner and determine if there are any underlying issues that need to be addressed. They can also repair any issues with your AC unit, as well as give advice on how to keep it running optimally.

How to Prevent Your Air Conditioner Blowing Out Warm Air

To ensure that your air conditioner runs efficiently and continues to blow out cool air, it is important to take some preventative measures. These include: 

  • Regularly cleaning or replacing the air filter
  • Keeping the outdoor unit free of dirt and debris
  • Inspecting and cleaning the evaporator coil as needed
  • Trimming bushes and tree branches near the outdoor unit
  • Scheduling regular maintenance checks by an HVAC technician

By following these steps, you can avoid having to deal with a malfunctioning air conditioner in the near future.


A malfunctioning air conditioner blowing out warm air is never fun. However, this issue can usually be resolved with some simple troubleshooting steps. First, check the thermostat and make sure that it is in the “cool” setting. Then, check the outdoor unit for ice buildup or debris blocking the airflow. Make sure to clean or replace the air filter regularly as well. If all else fails, contact an HVAC technician for professional assistance. Following some simple preventative measures can also help you avoid this issue in the future.

Contact Liberty Plumbing Heating And Air Conditioning if Your AC is Blowing Warm Air

Liberty Plumbing, Heating And Air Conditioning specializes in all kinds of AC repairs and maintenance. Our team of experienced HVAC technicians can provide professional and reliable services to ensure your air conditioner works properly and efficiently. We are here to help solve all of your air conditioning issues, no matter how big or small they are. Contact us today at (951) 760-4215 to schedule an appointment with one of our expert technicians. We will be happy to help you get your AC system running smoothly again.

We are honored to serve you and will show the utmost integrity while taking care of your needs.

You can depend on our highly trained, certified staff and know we have the ability to exceed your expectations.

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