What you should do if your AC stops Blowing Cold Air

HVAC

Blog
// Posted by Crossville Heating and Cooling, Inc.

Imagine a hot summer day and your air conditioning stops working. This leaves you and your family feeling uncomfortable. It's a common problem, but there are steps you can take to fix it yourself. Yet, it's smart to call professional HVAC experts to make sure your system is safe and lasts longer.

ac not blowing cold air

Key Takeaways

  • Inspect your air conditioning system thoroughly to identify potential issues
  • Common causes of an AC not blowing cold air include clogged filters, drain issues, and refrigerant leaks
  • Perform basic troubleshooting steps like checking power and thermostat settings
  • Consult with professional HVAC technicians for complex repairs or maintenance
  • Prioritize preventive maintenance to extend the lifespan of your air conditioning system

Understanding the Reasons Behind Your AC's Failure

When your air conditioning unit stops blowing cold air, it can be really frustrating. But, knowing why it happens is the first step to fixing it fast. Things like clogged filters or refrigerant leaks can make your AC not cool properly.

Common Causes of an AC Not Blowing Cold Air

Some common reasons your air conditioner might not cool well include:

  1. Clogged air filters: Dirty or clogged filters can block airflow, making your AC work harder and less efficiently.
  2. Refrigerant leaks: Leaks can lower refrigerant levels, making your AC cool less effectively, so you get warm air.
  3. Compressor issues: Compressor problems, like mechanical or electrical failures, can stop proper cooling.
  4. Ice buildup: Ice on the system can block heat transfer, so you get warm air instead.
  5. Thermostat malfunctions: Thermostat problems, like wrong settings or broken sensors, can mess up the cooling system.

Evaluating Your Air Conditioner for Potential Issues

To find out why your AC isn't cooling, you need to check it closely. Look at the air filters, check refrigerant levels, and inspect the compressor and other key parts. This helps you figure out the main problem so you can fix it.

If you're not sure how to check your AC or feel uncomfortable doing it, get help from a professional HVAC technician. They can quickly find and fix the issue, keeping your home cool and comfy.

Power Issues: A Simple Yet Crucial Check

When your air conditioning unit stops blowing cold air, start with the basics. Check the power supply to your AC unit first. A lack of power is often the reason why your AC won't turn on.

First, make sure the power cord is fully plugged into the outlet. Look for any damage like fraying or cracks on the cord. If it looks okay, then check the circuit breaker or fuse for your AC unit.

  • Find the circuit breaker or fuse box and spot the one for your air conditioning system.
  • See if the breaker is tripped or if the fuse is blown, stopping your AC from turning on.
  • If the breaker is tripped, reset it by switching it off and then back on.
  • If a fuse is blown, replace it with a new one of the same rating.

If everything electrical checks out but your AC still won't turn on, there might be a deeper issue. You should call a professional HVAC technician to check your air conditioning system's electrical problems.

Checking power issues is a key step in fixing an AC unit that's not cooling. By making sure the electrical parts work right, you can rule out a common cause of electrical problems. Then, you can look into other possible issues with your air conditioning system.

Clogged Air Filters: A Preventable Culprit

A clogged air filter is a top reason why your air conditioner may not blow cold air. A dirty air filter blocks the airflow, stopping cool air from moving around your home.

Over time, dust, debris, and pet hair can fill the air conditioner filter. This reduces airflow. The air conditioner's motor then works too hard, which can damage it and make cooling less effective.

To keep your air conditioner running well, check and replace the air filter often. Change it every 1-3 months if you have pets, live in a dusty area, or have allergies.

  • Check the air filter often and clean or replace it to stop air flow obstruction.
  • Changing the air conditioner filter regularly is key for air conditioner filter maintenance and good cooling.
  • A dirty or clogged air filter limits airflow. This makes the air conditioner work too hard and could cause expensive repairs.

Keeping your air conditioner's filter clean helps avoid the problem of warm air instead of cool air. This simple step of filter replacement is crucial for a comfy and energy-saving home all season.

Clogged Drain: A Potential Moisture Buildup Hazard

Air conditioners keep our homes cool and comfy. But, they can face a common problem - a clogged drain. This issue can cause water leaks and lower cooling efficiency.

Signs of a Clogged Drain and How to Address It

Seeing water pool around the unit is a sign of a clogged ac drain. This means the moisture from cooling can't drain properly. A musty smell from vents or the unit itself could also mean mold or algae in the drain line.

Reduced cooling and an AC freezing up are other signs of a clogged drain. In extreme cases, it might even shut off to prevent water damage.

Fixing a clogged ac drain is easier than you think. Try using water and vinegar to flush the line or a wet/dry vacuum for debris. But, for big clogs, call a professional HVAC tech for help.

Ignoring a clogged ac drain can cause big problems like water damage and mold. Regular maintenance and keeping the area clean can prevent clogs. This keeps your air conditioning working well.

A clogged ac drain can cause big issues, like water damage and mold. Watch for signs and fix it fast to protect your home and AC.

Condensate Airflow Switch: A Safety Mechanism

Your air conditioning system is key to keeping your home comfy. It has safety features to work well and avoid problems. The ac condensate switch is a vital part of these safety features.

This switch, also known as a condensate overflow switch or a water backup switch, watches for water in your air conditioner's drain pan. It's placed in the secondary drain pan or on the drainpipe, based on your HVAC setup. Its job is to turn off the AC right away if it finds too much water, stopping leaks and water damage.

If the drain line gets blocked or the condensate pump breaks, water can pile up in the drain pan. This makes the ac condensate switch turn on. It stops water backup, which could cause expensive fixes and harm your home's structure, furniture, and stuff. By turning off the AC, the switch protects your HVAC and your property from water issues.

Keeping your ac condensate switch in good shape is key for it to work right. If the switch turns off your AC, you need to fix the issue, like a clogged drain or a broken pump, before resetting it. Not fixing the problem can lead to more shutdowns and water damage to your home.

In short, the ac condensate switch is a crucial safety feature. It keeps your HVAC and home safe from water buildup problems. By knowing how this switch works and keeping it in good condition, you can keep your air conditioning running well and protect your property from water damage.

Dirty Air Compressor: Maintaining Optimal Performance

Your air conditioner's air compressor is key to its function. It's outside your home, working hard to move refrigerant and cool the air. But, if it gets dirty, your AC won't cool properly.

Keeping your outdoor unit clean is crucial to avoid AC problems. Make it a habit to remove dirt, leaves, or other debris around the compressor. This stops airflow and makes it hard for the compressor to cool efficiently, hurting your AC's performance.

You can try cleaning the compressor yourself, but for the best results, hire a pro HVAC technician. They have the right tools and knowledge to clean and check the compressor well. This ensures it works great and makes your AC last longer.

Don't overlook the need for outdoor unit care. A clean compressor means no AC breakdowns and a cool home all summer.

A well-kept air compressor keeps your AC running smoothly. Regular cleaning and checking your outdoor unit prevent expensive AC issues and keep your home comfy all season.

Ice Buildup: An Unexpected Cause of Warm Air

Ice on your AC coils might seem odd, but it can stop your unit from blowing cold air. This issue, known as a "frozen air conditioner," happens when things block airflow in your system.

Troubleshooting Steps for Ice Buildup

If you think ice buildup is why your AC isn't cooling, here's what you can do:

  1. Look at your air filters and coils for dirt. Dirty filters and coils block airflow, making the refrigerant too cold and causing ice on the coils.
  2. Clean the air filters and coils well. Use a coil cleaning solution and a soft brush to remove dirt.
  3. Run your AC in "fan-only" mode to melt the ice on the coils. This helps improve airflow and cooling.
  4. If ice keeps coming back after cleaning, it might mean your AC has low refrigerant. You'll need a pro HVAC tech to check for leaks and recharge the system.

Fixing ice buildup quickly is crucial. It can cause energy waste, damage parts, and even shut down your system. By following these steps, you can fix your AC and avoid more problems.

Regular maintenance and quick repairs keep your air conditioning working well. If you're not sure why your AC isn't cooling or if problems keep happening, get a pro HVAC tech to check and fix it.

Low Refrigerant Levels: A Telltale Sign of Leaks

Your air conditioning system needs refrigerant, also known as coolant, to cool your space. If your AC stops blowing cold air, it might be because of low refrigerant levels. Refrigerant doesn't get used up or "go bad" over time. Any loss usually means there's a leak in the system.

Here are signs that your AC might have a refrigerant leak:

  • Your AC is running more often to keep the room cool.
  • You see ice on the indoor coil or outdoor unit, which stops proper airflow and cooling.
  • Warm air comes out of the vents, showing a big refrigerant leak that stops the system from cooling well.
  • You hear hissing, gurgling, or bubbling sounds from the refrigerant lines.

Ignoring a refrigerant leak can really hurt your HVAC system. Losing refrigerant makes the compressor work too hard. This can lead to expensive repairs, like a compressor burnout. Also, a low refrigerant charge makes your AC work less efficiently and raises your energy bills.

If you think your AC is low on ac refrigerant because of a leak, get a pro HVAC technician to check it out. They can find where the signs of low refrigerant are coming from, fix any leaks, and refill your hvac system refill. This will make your air conditioning work better and cool your space efficiently.

Thermostat Issues: The Controller's Role

If your air conditioning unit isn't blowing cold air, the thermostat might be the problem. This controller sets your home's temperature. Thermostat issues can stop your AC from cooling your space. Let's look at common thermostat problems and how to fix them.

First, make sure the thermostat is set correctly. If it's not low enough, your AC won't cool your home. Try setting it all the way down or to the lowest. If it still doesn't work, the wiring or power might be the issue.

  1. Check the thermostat's wiring connections to ensure they are secure and free of any damage.
  2. If the thermostat requires batteries, make sure they are new and installed correctly.
  3. Check for a tripped circuit breaker or blown fuse that could be cutting power to the thermostat.

A faulty thermostat sensor is another problem. Over time, it can give wrong temperature readings. This might make the AC run too much or not at all. Try resetting the thermostat by waiting at least 15 minutes before checking the temperature again.

If the thermostat is still not working right, it might need replacing. A bad thermostat control board or other parts can stop your AC from working. This can cause it not to respond to thermostat changes.

Fixing thermostat problems can get your air conditioning working again. Regular maintenance and quick action on ac not responding to thermostat issues can also make your HVAC system last longer. This keeps your home comfortable all year.

If you're still having thermostat problems or don't know how to fix them, call a professional HVAC technician. They can find the issue and fix or replace it to make your air conditioning work well again.

ac not blowing cold air: Comprehensive Diagnostic Approach

When your air conditioning (AC) system stops blowing cold air, it can be really frustrating. But, with a step-by-step process, you can find and fix the problem. I'll show you how to diagnose and solve the issue, keeping your home cool and comfy.

First, let's look at why your AC might not be cooling. Issues like power problems, dirty air filters, drainage issues, compressor or refrigerant problems, and thermostat issues can cause it. By checking each of these, you can find the main cause and fix it.

  1. Power Issues: Make sure your AC has power. Check the circuit breakers and reset them if needed. If it still doesn't work, get a pro HVAC tech for help.
  2. Air Filter Inspection: A dirty air filter can block airflow, making your AC work less efficiently. Change the filter every 3 months or more if you have pets.
  3. Drainage System Check: A blocked drain can cause moisture buildup, stopping your AC from cooling. Clean any blockages to keep the condensate flowing right.
  4. Refrigerant Level Evaluation: Not having enough refrigerant can stop your AC from cooling the air well. A pro can check the levels and add more if needed.
  5. Thermostat Inspection: Make sure the thermostat is set right and working well. It should accurately show the room's temperature.

By checking these common problems, you might fix your AC and get it cooling again. But if it's still not working or if you find more complex issues, call a pro HVAC tech. They have the skills and tools to handle tough AC problems, keeping your home cool and saving energy.

Air Conditioning Repair: Professional Assistance

If your air conditioning unit stops working, it's important to fix it quickly. This keeps your home cool and stops more damage. While you can try some simple fixes, working with a professional ac repair service is often best.

Benefits of Partnering with Professional HVAC Technicians

Choosing a skilled hvac contractor has many benefits for fixing your air conditioning:

  • Expertise and Diagnostics: A professional hvac technician can quickly find the problem, like a dirty filter or refrigerant leak.
  • Efficient Repairs: They fix the issue fast, reducing the time your AC is out of order.
  • Comprehensive Solutions: They check your system fully, find any other problems, and suggest the best fix.
  • Preventive Maintenance: They can also do regular maintenance to make your AC last longer and avoid future problems.

Working with a trusted professional hvac contractor means your AC repair is in good hands. Your home will be cool again quickly.

Preventive Maintenance: Extending Your AC's Lifespan

Regular annual AC tune-ups keep your air conditioner running well. A well-kept HVAC system works better and avoids expensive repairs in the heat. An HVAC maintenance plan helps you stop AC breakdowns. This way, your cooling system keeps you comfortable for many years.

Tasks like cleaning or replacing air filters, checking the condensing unit, and refrigerant levels are key. These steps keep your air conditioner running smoothly. They also improve air quality inside and lower the chance of sudden breakdowns.

  • Replacing a dirty or clogged air conditioner filter can decrease energy consumption by 5% to 15%.
  • Cleaning the evaporator coil annually can prevent dirt buildup, maintaining airflow and heat absorption capacity.
  • Keeping the outdoor condenser coils clear of dirt and debris helps ensure adequate airflow.
  • Addressing clogged drain channels prevents humidity buildup, which can damage walls or carpet.

Working with a professional HVAC technician for regular check-ups is best. They do full system checks, find and fix problems, and give expert advice to make your cooling system last longer.

Proactive maintenance saves you from the trouble and cost of a broken AC in the summer. Regular tune-ups and care make your HVAC system last longer. This means you get to enjoy cool, efficient air for years.

Conclusion: Restoring Comfort and Cool Air

If your air conditioning system stops blowing cold air, don't worry. Follow the steps in this article and do regular maintenance to fix it. If you're not sure how to fix it, call a professional HVAC technician for help.

With the right help, your AC will work great again soon. Regular tasks like changing air filters and cleaning the condenser unit help your AC run better and last longer. Fixing issues like refrigerant leaks, compressor problems, and electrical faults also makes sure your AC cools your home well.

Being proactive and getting expert help when needed helps you beat any air conditioning problems. This way, you can enjoy cool comfort, even when it's very hot. With the right steps and support, you can get ac working again, restore home comfort, and keep your AC in top shape for a long time.

HVAC Technician installing a electric heat pump
About Crossville Heating and Cooling, Inc.
Crossville Heating and Cooling, Inc. is a locally owned heating and air conditioning company that provides sales, service, and installation of any type of heating or cooling in your home or light commercial building.

Although the name Crossville Heating and Cooling, Inc. is new, Mr. Richard Gilmer has been in the business of keeping his neighbors comfortable since 1998. As our presence in the HVAC contractors industry has evolved, we decided to change the name of our business to better reflect our commitment to the Middle TN area.

Our core values include implementing economically friendly products and practices to better contribute to the health and home of our customers. We are EPA certified and ensure that all refrigerant is recycled and all equipment is disposed of as per environmentally-safe standards. Our service techs and installers are trained to conduct business with minimal disruption to your daily lifestyle so that the only impact we make is a positive one

FAQ

What are some common reasons why my air conditioner is not blowing cold air?

Your air conditioner might not cool properly due to a clogged filter, drain, or condensate airflow switch issues. Other reasons include a dirty air compressor, ice buildup, low refrigerant levels, power problems, or thermostat issues.

How can I troubleshoot a clogged air filter on my air conditioner?

First, check the air filter and clean or replace it if it's dirty. Regularly changing the filters helps avoid clogs and keeps airflow smooth.

What should I do if I suspect a clogged drain on my air conditioner?

A clogged drain can make your unit shut down. You might need to clean or replace the drain with a mild bleach solution.

How can I tell if the condensate airflow switch is causing my AC to not blow cold air?

If a water backup in the drain turns off your AC, clear the condenser drainpipe first. Then, reset the switch.

How do I clean the air compressor on my air conditioner?

Start by removing any dirt, leaves, or debris around the outdoor air compressor. For a deeper clean, consider hiring a professional HVAC technician.

What should I do if I notice ice buildup on my air conditioner?

Ice means your AC might have airflow issues or low refrigerant. Try running the fan to melt the ice. Then, check the air filters and coils. If it doesn't work, a technician can help.

How can I tell if my air conditioner is low on refrigerant?

A lack of cooling often means a refrigerant leak. Refrigerant shouldn't decrease over time. A leak requires professional repair.

What should I check if my air conditioner's thermostat is not working properly?

Make sure the thermostat is set correctly and the wiring is right. Check the thermostat batteries and replace them if they're dead.

When should I consider replacing my air conditioning system?

If repairs are too costly or your system is old, consider replacing it. A technician will check your system and suggest the best option.

How can I prevent future air conditioning issues?

Regular maintenance with a professional HVAC company helps. This includes cleaning or replacing air filters, checking the condensing unit, and monitoring refrigerant levels. Preventive care can make your AC last longer.

HVAC Technician installing a electric heat pump
About Crossville Heating and Cooling, Inc.
Crossville Heating and Cooling, Inc. is a locally owned heating and air conditioning company that provides sales, service, and installation of any type of heating or cooling in your home or light commercial building.

Although the name Crossville Heating and Cooling, Inc. is new, Mr. Richard Gilmer has been in the business of keeping his neighbors comfortable since 1998. As our presence in the HVAC contractors industry has evolved, we decided to change the name of our business to better reflect our commitment to the Middle TN area.

Our core values include implementing economically friendly products and practices to better contribute to the health and home of our customers. We are EPA certified and ensure that all refrigerant is recycled and all equipment is disposed of as per environmentally-safe standards. Our service techs and installers are trained to conduct business with minimal disruption to your daily lifestyle so that the only impact we make is a positive one

Related Blog Posts

Why Isn’t Your Unit Maintaining Temperature?
Why Isn’t Your Unit Maintaining Temperature?
If your heat pump isn't maintaining temperature, it may be due to issues like dirty filters or low refrigerant. Regular maintenance and timely professional help can ensure efficient operation.
Read More →
 First Frost: Your Guide to HVAC, Generators, and Plumbing
First Frost: Your Guide to HVAC, Generators, and Plumbing
Prepare your home for winter with our essential guide on HVAC maintenance, generator readiness, and plumbing tips. Discover how to ensure your heating system runs efficiently, keep your generator in top shape for power outages, and protect your plumbing from freezing.
Read More →
Boost Your Home’s Energy Efficiency with Crossville Heating, Cooling, Plumbing, and Generators
Boost Your Home’s Energy Efficiency with Crossville Heating, Cooling, Plumbing, and Generators
Improving your home’s energy efficiency doesn’t have to be overwhelming. By taking small steps, you can make a big difference in your energy consumption and costs.
Read More →
How Can I Improve My Home’s Energy Efficiency?
How Can I Improve My Home’s Energy Efficiency?
Improving your home’s energy efficiency doesn’t have to be overwhelming. By taking small steps, you can make a big difference in your energy consumption and costs. If you have questions or need assistance with HVAC and plumbing upgrades, contact Crossville Heating, Cooling, Plumbing, and Generators today!
Read More →
How Can I Improve the Air Quality in My Home? Find Solutions Here
How Can I Improve the Air Quality in My Home? Find Solutions Here
Improving your home's air quality is essential for maintaining a healthy environment, especially given local air quality challenges. By understanding common pollutants and implementing straightforward strategies, you can create a safer indoor space.
Read More →
Navigating Your Air Conditioning System: How Rain Affects Your AC
Navigating Your Air Conditioning System: How Rain Affects Your AC
This guide highlights how rain can affect your air conditioning system, addressing issues like windblown debris, flooding risks, and potential rust and corrosion. For reliable service and maintenance, trust Crossville Heating and Cooling to keep your AC running smoothly, rain or shine.
Read More →
How to Maintain Your HVAC System on Rainy Days
How to Maintain Your HVAC System on Rainy Days
This guide offers key maintenance tips for keeping your HVAC system efficient during rainy weather, such as checking outdoor units and monitoring humidity. Proactive care helps ensure comfort and prevents costly repairs.
Read More →
Welcome Fall: Essential Home Solutions for a Cozy Season
Welcome Fall: Essential Home Solutions for a Cozy Season
As we welcome fall, taking the time to prepare your home can make all the difference in comfort and efficiency.
Read More →
How to Reset Your Thermostat
How to Reset Your Thermostat
If your thermostat stops working on a chilly fall day, try resetting it by turning off the power and restoring it after a few minutes. If issues persist, consult an HVAC professional for assistance.
Read More →
HVAC Technician worker outside working on a ac unit

Need HVAC Service? 
Contact Us Today!

Stay comfortable year-round! Don't wait for a breakdown. Click here to schedule your HVAC repair or installation today!