Why is My Central AC Not Blowing Cold Air?

Pierce Refrigeration gives homeowners troubleshooting tips if their air conditioner is not blowing cold air.

The last thing you want on a hot summer day is a malfunctioning air conditioning system. If you are experiencing issues with your AC, knowing some troubleshooting options can often times get your home back to its comfortable temperature without requiring professional repairs. If your system is still running, and just not creating enough cool air, then go through our checklist below. There are several reasons why your central AC could be acting more like a fan and less like a cooling system. If these solutions do not solve the issue then make sure to call a HVAC professional to evaluate your cooling system. 

Common Issues and Solutions to Try

A Dirty Filter: 

Regular HVAC maintenance is essential for your system to work correctly. One element of this is changing your filter regularly. A dirty filter can cause a variety of issues. Depending on what type of filter you have determines the frequency it needs to be cleaned or changed. To learn about different types of air filters read our blog here. For most AC filters, it is recommended that you change them every 1-3 months. If you prefer to have your maintenance taken care of by a professional, we recommend signing up for our Preventative Maintenance Plan. 

Power Supply Issues: 

Check to ensure your unit hasn’t been unplugged and that the cords are not damaged. Your fan can still run even if the cooling unit isn’t connected to power.

Improper Airflow: 

Check inside and around your air ducts and vents for obstructions and debris. Once you have cleaned these areas, you can determine whether or not this is the cause for cool air not flowing into your home. In more extreme cases, you may need to replace your ductwork. Check out our previous blog post to know when that may be necessary.

Thermostat is Set Incorrectly: 

Check to make sure your thermostat is not set to “heat.” This happens accidentally from time to time and is an easy fix. Make sure your thermostat is set to “cool.” Also, check that your thermostat’s fan settings are not set to “on.” You should have your thermostat’s fan settings on “auto” so that it only blows out cool air and does not blow warm air when your AC takes a break.  

Setting your thermostat correctly allows your HVAC system to work efficiently and effectively.

Other Causes that Require a Professional

There are some issues that you won’t be able to diagnose or fix yourself. Common problems include blocked registers, refrigerant leaks, and evaporator coil or condenser malfunctions. If DIY troubleshooting does not work, it is important to have a professional HVAC technician check out your cooling system. 

When to Replace Your System

While an air conditioner blowing warm air is frequently not cause for alarm, sometimes it can be a sign that the system is reaching the end of its lifespan. Replacing your AC system might be your best option if it’s over 15 years old. Keeping an old system might seem like the best option if you are not ready or able to purchase a new system at the moment. However, it is important to remember that older systems break down more frequently, and the cost of repairs will add up over time. Additionally, newer systems are more efficient and will cut your energy costs by up to 50%!There are many rebates available that can help you with the upfront costs of a new system.

Reach out to our team anytime to discuss any of your air conditioning questions and concerns.

If your question isn’t answered here, contact the Pierce Refrigeration team, and one of our experts will guide you in finding your solution.

Need 24-7 emergency service? Looking for advice on improving your everyday air quality and comfort at home and work? Contact the friendly staff at Pierce Refrigeration at 800-696-1088 or info@piercerefrig.com.

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