Why Is My A/C Blowing Warm Air? | R. A. Styron | A/C Specialist

Every spring/early summer we get so many of the same calls, My A/C is not cooling my home! This is the most common service call we field in the spring and summer. There are a handful of reasons your A/C may not be cooling your home, here are the more common:

First thing first… Is there air blowing out of your vents?

If your A/C is blowing air, just not cooled air, one of these issues may be your problem:

  • Check the fan setting at the thermostat. If your thermostat fan setting is set to “on” and not “auto” your system will blow air at all times, even when it’s not being cooled. Switch it to “auto” and hopefully that will solve the problem. Easy enough right?
  • Check your filter. If you notice that you are not getting ample air flow out of the vents, most likely you have a dirty filter that needs changed ASAP. A dirty air filter can cause multiple issues with an otherwise perfectly healthy system by blocking air flow. If you aren’t sure how to replace your filter or what type of filter is needed, check out our BLOG dedicated to air filter replacement.
  • Check your outside AC unit. Outdoor systems that are covered in dirt, grass, tree branches, or bushes will not be able to “breath” also restricting air flow. Dust, dirt, grass, etc should be hosed off of the system while any branches or bushes should be trimmed away leaving plenty of breathing room around the system. If the outdoor system is clear but the outside fan is not running, you will need to call in a professional to diagnosis and repair the system.

If you have gotten through all of these tips but are still experiencing warm air blowing, you may have a refrigerant leak. Often you will notice ice on the system, as well. It is best in this scenario to completely shut the system down while you wait on a repair man to assess the system and determine the next course of action.

If you notice your A/C is not blowing any air at all, check these few items:

  • Check the setting at your thermostat. The temperature setting should be at least 5 degrees below your room temperature. You should also check to be sure the thermostat is set to “cool”, you would be surprised how many homeowners, unknowingly think that they have an air conditioning problem when all along all they needed to do was switch the thermostat over to “cool”.
  • Check you filter. Checking your filter should be one of the first things any homeowner does when they are experiencing any type of AC issue. Filters can clog up extra fast, completely blocking airflow to the system. The filter should be checked or changed at least once a month to insure properly air flow. If you need help purchasing a new filter we’ve posted a link to a blog all about them, above.
  • Check your breakers. Breakers to air conditioning systems can trip for a number of reasons. If you notice that the breaker is tripped try flipping back into the “on” position. If it trips again it’s time to call in a professional. Many systems have safety switches that will cut the system off when the condensation is not draining properly preventing major water damage to your home. Other times the system may be overheating leading the system to pull much more electricity than the circuit breaker can handle. Either of these issues should be handled by a professional and should not be ignored.

While there are other issues that could cause your air conditioning system to not cool your home, these are definitely the more common. Most of these problems can be easily avoided with a good maintenance plan. Your system should be cleaned and serviced at twice year by a professional to ensure your system is running safely and efficiently. R. A. Styron offers a comprehensive 20 point inspection and cleaning program that also offers discounts and perks that carry all year through. Rather you are in need of immediate service or would like to schedule an inspection, we make it easy to schedule online or by giving us a call at 757-420-5488.

Remember: An ounce of prevention is worth a pound of cure!



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