Nothing frustrates homeowners more than having an air conditioning unit blowing out hot air, especially during the summer months. Fortunately, you may be able to resolve the issue by checking your home thermostat settings. Otherwise, you can always call one of our HVAC contractors for air conditioning repair.

Below, you will find some of the reasons why your air conditioner could be blowing out hot air.


While this may seem like an obvious thing to check, we still get calls from homeowners where this is what’s causing the problem. It’s pretty common for the thermostat to accidentally be set to “heat.” All it takes is for someone to bump the thermostat or for a child to be playing with the settings.

If this is what’s causing the problem, you get the satisfaction of not having to pay a HVAC technician to come visit your house. (If only all air conditioner problems could be fixed so easily.)


Check your thermostat for the fan setting. If the thermostat is set to “on,” this means that the fan will run continuously, regardless of whether or not your air conditioner is sending cool air. This is why you may feel warm air coming out from your air conditioning vents.

To fix the issue, simply set the fan to “auto” so that it will automatically kick on with the air conditioner to move cool air throughout your home. Most homeowners are relieved when the issue is resolved through a simple solution.


We recommend you change the air conditioner filters every month to ensure that air is able to properly move to and from the air conditioning unit. A clogged air conditioner filter will cause your air conditioner to work harder to produce the same amount of cool air, reducing its energy efficiency. Eventually, your air conditioner won’t be able to produce cool air at all.

When homeowners feel only hot air coming from their air conditioning units, they call us for what could have been a preventable HVAC repair.


The air conditioner coil gets dirty if the unit isn’t regularly serviced by a HVAC technician. While we understand the temptation to not pay for air conditioner maintenance, it’s important that your unit gets serviced by an HVAC technician so that you can prevent expensive repairs. Dirty air conditioner coils are preventable through air conditioning service.

If none of these causes are applicable to your situation, we recommend you call us to schedule air conditioning repair. The sooner you schedule AC repair, the sooner we can make your home a cool oasis again. Call today to schedule your heating and cooling quote.

Our Lansing HVAC contractors are dedicated to helping you maintain a comfortable home year-round by offering air conditioning service. To schedule air conditioning repair, call A1 Mechanical at (517) 272-8629.