7 Reasons Why Your AC Is Blowing Out Warm Air

As the hot summer months roll in, your AC must be ready. The last thing you want to feel come out of your vents is hot air, which can be an extremely annoying problem. Have no fear; Stritmatter professionals are here to help you. 

This blog will give you a list of the most common reasons your air conditioner is blowing hot air and what AC maintenance you will need to perform. 

Suppose you need any assistance with AC maintenance repair or replacement. In that case, the experts at Strittermatter have the experience and knowledge to help with a wide range of issues.

1. Thermostat

When you start feeling warm air, the first thing you should check is the thermostat settings. The problem is likely the AC unit itself but the thermostat instead. After the winter months end, turn the “heat” setting off and switch the HVAC system over to “cool”.

Turn the fan setting on “auto” to have air blowing in your house. If the ac keeps blowing air, it will do whatever it needs to maintain the temperature, including blowing out air.

It’s also possible that your thermostat is faulty, and if that’s the case, then it’s best not to mess with it. Ensure it has fresh batteries, then call a technician to check for a faulty wire or screen. Switching to a new thermostat can lower the chance of a faulty thermostat and help with high utility bills.

2. Air Filters

Changing air filters routinely is so easy to forget. However, dirty air filters cause more problems than you might think. Clogged air filters strain your AC as it tries to maintain airflow. 

If your AC is blowing out warm air, it may be because the filters cannot spread around the cool air, and the evaporator coils might have frozen up.

Before calling for an AC repair service, clean or replace air filters; clean air filters will also ensure that the air quality in your home remains safe and healthy. Then turn off the AC and wait 24 hours for the coils to unfreeze.

3. Air Vents

One of your return vents may be blocking the airflow as well. Ensure that the vents are all open and that no furniture or household items are blocking them. 

4. Refrigerant

Warm air could be due to improper refrigerant levels due to a leak. When the HVAC system blows warm air and makes a hissing noise, you can be positive this is wrong.

The HVAC system depends on refrigerant levels to make cold air. Request service from a technician to locate and repair the leak and restore the refrigerant levels.

5. Electrical Issues

The thermostat and the HVAC system depend on electricity to communicate properly. The indoor unit could be working correctly but blowing warm air due to a disconnection from the outside unit. Electrical issues can be some of the most hazardous so make sure to take great care in solving these issues.

First, check the breaker and fuse box to look for tripped wires or power outages. Try resetting the outdoor component’s power as well.

The outdoor condenser is responsible for creating cool air, and until the HVAC system is repaired, it will blow around warm air. Call a professional if you suspect that you’re having electrical issues to avoid injuries to your AC or yourself or electrical fires.

6. Frozen Evaporator Coils

Most homeowners are familiar with the idea of an AC freezing. You open the closet where your ac unit is, and there’s a puddle of water dripping from a block of ice. These are the evaporator coils, and when air cannot flow freely, they collect condensation, and it will freeze. 

Dirty air filters can cause this problem, but more serious problems such as damaged ductwork, a leak, or other damaged hardware. As soon as you notice frozen coils, turn off your AC to stop the freezing process.

After checking your air filters, call a professional to ensure that your AC isn’t severely damaged.

7. Condenser Coils

The Condenser coils are not the same as the evaporator coils, and they could be the true cause of the hot air. These coils are unlikely to freeze, but they can be so dirty that your condenser can make cool air anymore.

In the outdoors, all kinds of grime find its way into the box and clog up the hardware over time, and eventually, the condenser coils are unable to get rid of heat in your home. You can clean condenser coils with gloves, a wet-dry vac, and a water hose. Make sure to turn the unit off before beginning cleaning, and call your technician if you’re concerned about any harm. An HVAC specialist will also be able to help you clean the coils and return them to working condition.

Schedule your HVAC Maintenance with Strittmatter

Once you try all of the simple fixes on this list, your AC should stop blowing warm air. Sometimes problems are beyond home remedy, and you shouldn’t have to deal with unbearable heat in your home during the summer.

Once you’ve tried everything you can and blow air still comes out of your vents, don’t wait any longer to call the HVAC experts at Strittmatter. Call us today at 940-246-2075 to learn about how we can keep your HVAC systems in top condition for the summer and beyond.


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