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Why Is My AC Blowing Hot Air?

Posted on AC Repair, The Cooler Blog, Tips February 16, 2018

Not having your air conditioner running correctly when you need it is miserable, and knowing exactly what the problem is and how it can be fixed is equally difficult. Start by taking a closer look at the unit’s symptoms. For example, if your air conditioner is blowing hot air, the issue could be connected to your refrigerant, thermostat, air filters, or another part. Troubleshoot using some of the items below and contact an HVAC services company for servicing.

Air Conditioner Problems You Can Correct on Your Own

Do a few basic checks to confirm that your system is running properly. The following tasks are easy to perform yourself. If a problem continues, you’ll know that your system may warrant professional attention.

  • Thaw your air conditioning unit: Your HVAC system could be blowing hot air because condensation has frozen on the coils. If you’ve set the unit to run on the highest setting on a hot day, the air conditioner could run cold enough to freeze the coils. Turn off the system for an hour or two to allow it to thaw. To avoid this problem, avoid operating the air conditioner on its highest setting for extended periods of time.
  • Reset your breakers: Your outside unit relies on electricity like any other appliance. Your thermostat may be operating correctly, but if the unit’s power supply is off, you won’t get cool air. Find your breaker box and switch on the power supply to your air conditioner. If this problem recurs or if you discover an expired fuse, contact an electrician for help.
  • Replace your air filters: Replacing air filters is an important and easy part of routine HVAC system maintenance. If you neglect this task for too long, the filter could become clogged, preventing cool air from flowing through it. Replacing your unit’s filter, as long as you can safely access it, is easy to do.

Air Conditioner Problems That May Need Professional Attention

Hopefully, one of the solutions above got your system running again. If not, you may need to contact an HVAC service professional for help. Below are a few issues that require a specialist’s attention:

  • Faulty compressor: A bad compressor can lead to overheating and problems with refrigerant. Only a professional can confirm an issue with this component.
  • Refrigerant issues: Refrigerant leaks could prevent air from cooling properly. Since handling refrigerant is dangerous, only a professional should correct refrigerant issues.
  • Faulty wiring: HVAC units are complex systems with plenty of wires. An electrical issue could be causing problems, and repairs will require professional servicing.
  • Faulty thermostat: Overheating, temperature fluctuations, and other issues may indicate a faulty thermostat.

Before peak cooling and heating seasons that will require your system to go through heavy use, schedule an HVAC system cleaning and maintenance check with All Year Cooling to make sure that your system will run efficiently when you need it most. Whether one of the do-it-yourself items worked or you had to call a professional, use this experience to note the importance of routine maintenance for your HVAC system.


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