Few things are more frustrating than turning on your air conditioner on a hot summer day only to feel warm air blowing from the vents. Not only does this defeat the purpose of your HVAC system, but it can also make your home uncomfortable during heat waves. If your AC suddenly blows warm air, it’s important to understand the possible reasons so you can quickly fix the issue and restore comfort to your home.
In this blog, we’ll break down some of the most common reasons your cooling unit might be blowing warm air during the summer.
Refrigerant Levels are Low
Refrigerant is an essential part of your air conditioning system. It absorbs heat from the air inside your home and releases it outdoors. If your system is low on refrigerant, it will be unable to cool the air in your home. The most common reason for low refrigerant is a leak somewhere in your system. If you feel like your system is having a refrigerant issue, contact a licensed HVAC technician from our team at Affordable Air. Our AC repair pros can find the leak, fix it, and recharge your system with refrigerant.
Some of the signs of low refrigerant that you may notice include:
- AC blowing warm or lukewarm air
- Ice buildup on the evaporator coils
- Hissing or bubbling noises coming from the unit
Evaporator or Condenser Coils are Dirty
Dirt and debris build up on your air conditioner’s evaporator and condenser coils over time. The evaporator coil absorbs heat from the air in your living space, while the condenser coil releases that heat outside. When either coil becomes dirty, it disrupts the heat transfer process and diminishes your system’s ability to cool your home effectively.
Dirty coils can cause warm air to blow from your vents, leading to your system overworking. This results in high energy bills and more wear on internal components. Routine maintenance and cleaning can help prevent this issue and keep your AC operating efficiently.
Issues With Your Thermostat
Sometimes the issue isn’t with your air conditioning system at all, but rather with the thermostat. If your thermostat is set incorrectly, it can cause the AC to blow warm air. It could be as simple as the thermostat setting being on heat instead of cool. Your preferences could have the wrong setting, which means the air conditioner won’t turn on when the actual room temperature is higher than the thermostat setting. Double-check all the settings, and ensure that the batteries in the thermostat are functioning properly as well.
If the problem persists, your thermostat may need repairs or replacement. Contact one of our HVAC technicians at Affordable Air to verify the thermostat’s calibration and ensure that there are no other issues that may affect your comfort this summer.
Power Issues
Sometimes, the indoor and outdoor components of your AC system can become out of sync because of a power issue in your home. If the outdoor condenser unit loses power but the indoor blower continues running, the system may blow warm air. Make sure that you check your circuit breaker panel to see if the outdoor unit has tripped. If so, reset the breaker and monitor your system to ensure it’s functioning properly. If the breaker trips again, call a member of our team to inspect your unit, as frequent tripping often indicates a more serious electrical issue.
Air Filter Clogs
Air filters are essential to your HVAC system, and they play a vital role in trapping dust, pollen, and debris so that these particles are not in the air that your family breathes. Over time, these filters can trap too much debris. This clogs the system, restricting airflow and reducing the efficiency of your system.
With restricted airflow, the evaporator coil can freeze, resulting in your AC blowing warm air. To keep your air filters clog-free, we suggest replacing them regularly. In most cases, you will need to change the filters every two to three months, depending on usage and the type of filter. You may need to change the filters more frequently if someone in your home has allergies or other respiratory issues.
Ductwork Issues
The ductwork in your home carries conditioned air from the HVAC system to different parts of your living space. If there are leaks or holes in the ducts, cool air can escape before reaching the rooms that you intend to cool. As a result, you may feel warm air blowing from the vents. The air conditioner is functioning as it should, but the temperature of the air is changing before it reaches its final destination.
Signs that you may have ductwork issues in your system include:
- Uneven cooling throughout your home
- A higher-than-usual energy bill
- Audible hissing or whistling sounds
A professional duct inspection from Affordable Air can help you identify and seal leaks to restore efficient airflow. If there are significant leaks in your duct system, we may suggest repairs or upgrading your home to use a ductless system that will be more efficient. A ductless mini-split system delivers cooled or heated air directly into specific zones of the home. This targeted approach minimizes energy loss and allows for greater control over individual room temperatures. Ductless systems are easy to install, operate more quietly, and come with advanced features and remote access capabilities.
Compressor Malfunction
The compressor is one of the most important parts of your cooling system, as it compresses and circulates the refrigerant between the evaporator and condenser coils. If the compressor malfunctions, it disrupts the entire cooling process in your home. A broken compressor may cause your air conditioner to blow warm air, or it could keep the unit from cooling altogether. Compressor issues are complex and require professional repair or replacement. If you suspect your system’s compressor is malfunctioning, contact us right away.
Age of Your Air Conditioner
Most air conditioning units don’t work as efficiently after a lifespan of 10 to 15 years. If your air conditioner is aging to this point, it may be reaching the end of its life. Older systems are prone to breakdowns, and problems with blowing warm air may become more common. If you notice that your air conditioning unit needs frequent repairs or the temperature in your home is inconsistent, upgrading to a modern, energy-efficient model can provide more reliable cooling during the summer heat.
Contact a Reliable HVAC Company
If your AC is blowing warm air, our cooling services experts can help. We know how important staying cool this summer is, and we will make sure that your family’s comfort is our priority. With over 20 years of serving Garland, our team of HVAC technicians has the expertise to find and resolve complex issues. Our prompt service protects your system from further damage and helps you avoid costly repairs in the future.
At Affordable Air, we are one of the most trusted HVAC companies in Garland. Contact us today to discuss your cooling needs with a member of our team, and we’ll set up an appointment that suits your schedule.
