8 Reasons Your Air Conditioner Isn’t Blowing Cold Air

Air conditioner blowing hot air

During the summer, your air conditioner cools your living area, and hot air can be really uncomfortable. Many homes have issues with their air conditioner not producing cool air due to various reasons. Understanding the causes of why your AC doesn’t blow cold air can help fix the issue and restore proper system operation. Here are eight causes of warm air coming from your air conditioner, along with advice on identifying and resolving the issue.

Reasons Your AC Unit Is Not Blowing Cold Air

1. Low or Leaking Refrigerant

Air conditioners use refrigerant to chill air, and leaks in coils or lines can cause a drop in refrigerant levels, causing warm air to escape vents or decreased cooling efficiency. Over time, low refrigerant levels can cause the air conditioner to work too hard, increasing energy costs and consumption.

Insufficient refrigerant can also damage the compressor and other crucial parts, requiring costly repairs. Therefore, it’s crucial to address refrigerant leaks promptly to maintain optimal cooling efficiency. If you notice refrigerant leaks or low levels in your unit, contact an HVAC specialist immediately. They will identify and fix the issue, and ensure your air conditioner operates efficiently by replenishing it with the appropriate amount of refrigerant.

2. Dirty Filters

Dirty filters in your air conditioning system can hinder its ability to cool your living area. These filters catch dust, debris, and other contaminants, which can lead to a buildup of junk and limited airflow. This can cause the air conditioner to overheat, trip safety switches, shut down, or emit hot air. 

Overuse can also increase wear and tear on the unit’s components and result in costly repairs. Experts recommend replacing or cleaning your air conditioner every 30 to 90 days, depending on usage frequency and pollution levels. Regular cleaning or replacement of filters can help maintain the unit’s effectiveness and efficiency.

3. Thermostat Issues

If warm air flows through your vents, there might be a problem with your thermostat. To achieve the required temperature, reset the thermostat and try troubleshooting your equipment. If the air coming from your air conditioner isn’t chilly or doesn’t blow air at all, make sure all the wires are connected and check the batteries. If the issue persists, get in touch with an HVAC specialist for an accurate diagnosis.

4. Clogged Drainage

The moisture your AC unit removes from the air may lead to the growth of mold if it isn’t serviced on a regular basis. Contact a certified technician every six to eight months, depending on how frequently you use your air conditioning unit, to avoid any clogs in your drain hoses.

5. Frozen Evaporator Coil

The evaporator coil is found in the indoor portion of your air conditioning unit. Cool air is pumped into your home through the evaporator coil, which removes heat and moisture from the interior. Warm air enters the coil. If you observe excessive condensation close to the indoor unit, inadequate ventilation, or frost accumulation on the refrigerant tubing, the evaporator coil might be frozen.

6. Dirty Condenser Unit

Heat from the inside of your house is collected by the condenser. The condenser coil is found outside, and cannot release the heat that has accumulated in its system if it is clogged with dirt, grass, or other debris. This may result in issues with the AC, and occasionally, even a system shutdown. After carefully removing any dirt or debris, give the coil a gentle hose rinse. Avoid applying excessive pressure to avoid bending any of the coil’s “fins.”

7. Malfunctioning Compressor

The compressor is an essential component of your cooling system. It compresses and distributes refrigerant throughout the unit. A malfunctioning air conditioning compressor has an impact on the entire system. As a result, hot air may come out of your vents, and your air conditioner may lose its ability to cool.

8. Electrical Issues

Your air conditioner is a powerful electrical appliance that takes a lot of energy to run. Should your unit fail to produce cold air, there might be an issue with the fuse box. Look inside your electrical box for any tripped switches or blown fuses.

What to Do if Your AC Is Still Blowing Warm Air

If you notice unusual noises or uneven temperatures in different rooms, it’s essential to have your air conditioner inspected. Our team will thoroughly examine your unit to diagnose the problem and provide the necessary repairs. If your air conditioner suddenly breaks down, we offer emergency AC repair services 24/7. If repair services don’t resolve the issue, we may need to replace your air conditioner. We use advanced technology and equipment for our AC repair services. Total Comfort offers a range of HVAC services, including:

best way to heat your Minnesota home

Schedule an Appointment

Total Comfort offers exceptional AC repair services in Minneapolis and St. Paul, MN. We provide fast, friendly, and affordable services, ensuring no hidden costs, flexible scheduling, and no hidden costs. Our technicians can efficiently complete large or small jobs, quickly restoring your home or business to a comfortable temperature.

We guarantee your satisfaction with our work and service. Contact us to schedule an air conditioning tune-up or repair service today.

Need Service Now?Call: 763-307-4954

Our Affiliations & Certifications