If submitting a service request after hours or on the weekend, please note it is best to call.

(409) 240-0943 Request Service

Why is My AC Blowing Warm Air?

July 27, 2021 | Blog

When your AC is on but only blowing warm air, you know something is wrong. But what causes this issue? Here are few troubleshooting tips to help you figure out why your AC is blowing warm air.

Incorrect Thermostat Settings

If your AC doesn’t seem to be blowing cold air, check the thermostat settings first. You’d be surprised how easy it is to accidentally change the settings while adjusting the temperature. Your thermostat should be set to COOL and the fan should be set to AUTO. Make sure your thermostat is set correctly before anything else when your AC isn’t working — if the settings were off, give it a few minutes for cool air to start coming out of the vents.

Electrical Connections

Did you know that most air conditioners have separate electrical connections for the indoor and outdoor units? A loss of power to the outside unit could mean the AC inside is still working but unable to cool the air. Locate your electrical panel, and check the circuit breakers labeled for your HVAC system. If any of them are switched off, flip them back on and make sure both AC units are working.

Keep in mind that having to do this often indicates a more serious problem with your electrical system. If this is the case, call a professional electrician to inspect the system as soon as possible.

Dirt in the System

We’ve all been told how important it is to regularly change the air filter, but it’s still easy to forget. If your AC is set properly and has power, there could be dust, dirt and other debris built up in your AC system. When it accumulates in your condenser unit, on the coils or in other areas of the system, dirt prevents the proper flow of air and can completely block the cooling process. You or a professional will need to clean any dirt out of the system.

Low Refrigerant

Refrigerant should never run out or be too low. However, refrigerant leaks in your air conditioner’s coils can happen. When your refrigerant is low, the AC can’t operate efficiently and may even stop working altogether, blowing only warm air. You can prevent this problem by scheduling regular AC tune-ups in the spring, during which a technician will check your air conditioner’s refrigerant to make there are no leaks.

Call the Pros

If your AC is blowing warm air even when set and powered properly, it’s time to call a professional. The experts at Efficient Systems will be able to quickly inspect your air conditioners, pinpoint the problem and recommend repairs.

Contact Efficient Systems today for more information or to schedule your AC repairs.


Why Choose Efficient Systems?

We guarantee that the equipment we have installed will perform as we have stated, or we will remove it and return 100% of your investment.
If we do not have your new system operating by the date promised, we will pay you $500 for your inconvenience.
You will save a minimum of 30% on your heating and cooling costs or we will refund double-the-difference of your savings not realized during the first year.

What Our Customers Have To Say

Very Professional

James was very professional and knowledgeable. Fixed the unit quickly and explained the process and effects of the repair/maintenance. Will always call ES from now on! Very happy with the work.

Joni N.

Top Notch Service

James, the technician was very efficient and professional. Our attic space is very challenging to access and he managed to survive the adventure stoically! Did a great job of explaining system status and what was checked. Top notch overall.

Jim L.

Outstanding Service

105 heat index day and AC not working correctly. Ryan Boyles was the tech that came to help. Diagnosed problem very quickly and fixed the issue. Looked at warranty package and determined the repair was warranty work…so NO charge. Outstanding.

Roy O.