At Ashley Brothers Heating & Cooling, we know just how important a functioning air conditioning system is—especially during those sweltering summer months. Whether you’re at home or running a business, when the AC starts acting up, it quickly turns into an uncomfortable (and sometimes even dangerous) situation. Fortunately, most common AC problems can be fixed quickly and efficiently—if you know what to look for and have the right team on your side. In this post, we’re pulling back the curtain on the most frequent issues our technicians see in the field, and how we resolve them fast so you can stay cool and comfortable.
When Your AC Won’t Turn On
One of the most common issues our customers call us about is a unit that simply won’t turn on. If you’re wondering “why is my ac not working?”—this is often the first sign. Several factors could be at play here, and our experienced technicians always begin by checking the basics: thermostat settings, power sources, and circuit breakers. Believe it or not, a tripped breaker or dead thermostat battery is often the culprit.
If the power supply isn’t the issue, we then look into deeper mechanical problems such as a failed capacitor, blown fuse, or malfunctioning contactor. These are critical components that regulate how and when your air conditioner powers on. Our team carries a full inventory of replacement parts to ensure we can swap out faulty pieces on the spot, eliminating long wait times and keeping your home cool.
Because we know every hour without AC is a big deal, Ashley Brothers Heating & Cooling is structured for rapid response. Our trucks are stocked, our techs are trained, and our dispatch system is designed to get us to your doorstep as quickly as possible.
AC Blowing Warm Air
Another frequent concern we hear is that the air conditioning unit is running—but it’s blowing warm air instead of cool. This frustrating problem can have a few different causes. One of the most common is restricted airflow, typically due to a dirty air filter or a blocked return vent. During a service call, our team checks the entire air pathway, replacing filters and clearing blockages to restore full function.
Another potential issue is a refrigerant leak. Refrigerant is the lifeblood of your cooling system, and if levels drop too low, your AC simply can’t cool the air. Signs of a leak include hissing noises, frozen coils, or reduced airflow. If we suspect a refrigerant issue, we’ll run diagnostic tests to locate the leak, seal it properly, and recharge the system to manufacturer specifications.
Compressor problems and faulty thermostats are also suspects in this scenario. Our comprehensive diagnostic tools allow us to determine exactly what’s wrong without guesswork, giving you an accurate quote and a clear repair plan on the spot.
Strange Noises from the Unit
Air conditioners should be heard, not noticed. A slight hum or the sound of rushing air is normal—but if your unit starts to grind, squeal, rattle, or buzz, it’s time to call the pros. Odd noises are often the first sign of a part that’s wearing out or already broken.
Grinding noises often indicate a problem with the motor bearings. Squealing could mean a belt is loose or worn. Rattling might point to loose hardware or debris inside the unit. Buzzing can stem from electrical issues, including a failing capacitor or a contactor that won’t engage properly. These types of problems rarely go away on their own and usually get worse with time, so fast intervention is key.
At Ashley Brothers Heating & Cooling, we prioritize these service calls because we know the sound is more than just annoying—it’s a signal of deeper trouble. We’ll isolate the sound, identify the faulty part, and either repair or replace it on the spot. In most cases, we can restore your AC to full function during the same visit, thanks to our commitment to fully stocked vehicles and trained staff.
Water Leaks and Drainage Issues
It’s not unusual for homeowners to call us in a panic after noticing water pooling around their AC unit. Although it may seem alarming, this is actually a common and usually fixable problem. Most AC systems create condensation as part of the cooling process, and that water is typically channeled away through a drain line. If that line becomes clogged, broken, or disconnected, you’ll end up with water where it shouldn’t be.
When we respond to these calls, our first step is inspecting the drain line and clearing any obstructions—often caused by dirt, mold, or algae buildup. In more severe cases, we may need to replace the line or address issues with the drain pan. If left unchecked, drainage issues can lead to mold growth, water damage, and even electrical hazards, so we take every leak seriously.
We also check the evaporator coil for freezing, which can cause overflow when it thaws. If we find frozen coils, that typically indicates restricted airflow or low refrigerant—both of which we’ll resolve as part of the same service. That’s one of the key reasons why our customers trust our ac repairs: we get to the root of the problem instead of applying temporary fixes.
Uneven Cooling Throughout the Home
Have you ever walked from one room into another and felt a dramatic difference in temperature? Uneven cooling is one of the more subtle but persistent AC problems we fix. This often happens due to issues in the ductwork—such as leaks, blockages, or poorly designed layouts that fail to deliver balanced airflow.
Our team uses airflow meters and infrared technology to diagnose these inconsistencies. If we find leaks in your ductwork, we’ll seal them with professional-grade materials. If poor design is the issue, we’ll recommend and implement adjustments to balance your system better. In some cases, the issue is with zoning, or the need for better thermostatic control in larger homes. We can install smart thermostats and zoning systems to give you precise control over each area of your home.
Sometimes, the root cause is as simple as a neglected air filter or an AC unit that’s not appropriately sized for your space. During every call, we conduct a full system evaluation to ensure your cooling setup is optimized for efficiency and comfort. Our air conditioning tips are always customized to your home’s layout and your lifestyle needs.
Preventative Maintenance: Our Best Fix is the One You Don’t Need
While we pride ourselves on being fast and efficient at solving problems, we’re even bigger believers in stopping them before they start. One of the best things you can do for your AC system is to invest in routine maintenance. Our preventative maintenance services are designed to catch small problems before they become big repairs—and keep your system running smoothly all season long.
During a typical maintenance visit, we’ll inspect every component of your system: from refrigerant levels and electrical connections to fan motors and filters. We’ll clean the coils, test for efficiency, and make minor adjustments that can extend the life of your unit. You’ll get a full report on the condition of your system and practical advice on how to fix ac problems before they interrupt your comfort.
Many of our clients sign up for our seasonal maintenance plans, which include priority scheduling, discounted repairs, and peace of mind that your AC is ready to handle even the hottest days. If you’ve ever asked yourself “why is my ac not working” in the middle of July, you know the value of being proactive.
Conclusion
At Ashley Brothers Heating & Cooling, we believe in service that’s fast, friendly, and always focused on long-term value. Whether it’s your first time calling us or you’ve been with us for years, we treat every home like it’s our own—and every system like it’s mission critical. When you need ac repairs, we’re just a call away.
We’re here to keep your home comfortable, your AC running at its best, and your summer stress-free. Stay cool—and remember, the sooner you call, the faster we fix it.
Need HVAC Services in St. Louis, MO?
Keep cool or stay warm with Ashley Brothers Heating & Cooling. Since 1999, Ashley Brothers have been providing residential and commercial services to the St. Louis and Jefferson County area. We specialize in the installation of new equipment, heating and cooling repair, and furnace cleaning. Craftsmanship is important, equipment choice is too. We work with only top brands like Amana, Goodman, York, and McLain. It is understandable that replacing or upgrading your equipment can be daunting. Ask us about financing. We repair all heating and cooling equipment brands. Heating and cooling repairs can happen at random, take advantage of our 24-hour emergency service. Call us today about your concerns.
When the summer heat hits its peak and your home feels more like a sauna than a sanctuary, the last thing you want is an air conditioner that refuses to do its job. Few things are more frustrating than a malfunctioning AC, especially when it’s supposed to be your shield against the sweltering sun. But before you resign yourself to sweaty days and sleepless nights, take a closer look at the possible reasons why your AC isn’t cooling. Often, the problem can be pinpointed and resolved with a little know-how, saving you from unnecessary discomfort and costly repairs. In this blog post, we’ll explore common reasons your AC might be failing and offer actionable ac repair tips and solutions to get your home feeling cool and comfortable again.
Common Culprits Behind Inefficient Cooling
There are numerous factors that can hinder an air conditioner’s ability to cool a space effectively. One of the most frequent issues is a clogged air filter. Air filters trap dust, dirt, and allergens to maintain air quality, but when they become too dirty, they can restrict airflow. This reduced airflow forces your system to work harder, and over time, it hampers its cooling efficiency. If your AC seems sluggish, this is one of the first areas you should check.
Low refrigerant levels are another common problem. The refrigerant is the chemical responsible for absorbing heat from inside your home and releasing it outdoors. If there’s a leak or the levels are insufficient, your AC won’t be able to complete the cooling cycle efficiently. Unlike a clogged filter, dealing with refrigerant is not a DIY task. If you suspect this is the issue, professional ac repair is essential.
Another often overlooked culprit is a dirty condenser coil. Located in the outdoor unit, the condenser coil releases the heat absorbed from your home. When it’s coated with grime, it can’t perform this function effectively, which leads to poor cooling. Regular ac maintenance should include cleaning this component to ensure it’s operating at peak performance.
Finally, incorrect thermostat settings or a malfunctioning thermostat can lead to cooling issues. It might sound trivial, but sometimes the problem lies not with the unit but with the device telling it what to do. Always verify that your thermostat is set to “cool” and that the temperature is set lower than the room’s current reading. If your thermostat is battery-operated, replacing the batteries might also solve the problem.
The Importance of Routine AC Maintenance
Most air conditioner problems are preventable with regular ac maintenance. Just like a car needs oil changes and tire rotations to stay roadworthy, your AC needs attention to remain efficient. Maintenance routines should be performed at least twice a year—ideally in the spring and fall—to prepare for the heavy demands of summer and winter.
A typical maintenance check will include cleaning or replacing filters, inspecting and cleaning coils, checking refrigerant levels, testing the thermostat, and ensuring that all electrical connections are secure. While some of these tasks can be done by homeowners, such as changing filters or cleaning the accessible parts of the unit, a licensed technician should handle the more technical aspects.
Regular maintenance does more than just improve cooling efficiency. It extends the lifespan of your air conditioner, improves indoor air quality, and lowers your energy bills. An AC system that has to work harder due to neglect will consume more power, putting a strain on both your unit and your wallet. Moreover, staying on top of maintenance reduces the likelihood of sudden breakdowns during the hottest days of the year when HVAC professionals are hardest to book.
When to DIY and When to Call the Pros
It’s tempting to take a DIY approach to ac repair, especially with countless online tutorials promising quick fixes. While certain tasks are safe and manageable, others can be dangerous or cause more harm than good if not performed correctly. Understanding where to draw the line is essential.
Cleaning or replacing the air filter is a safe and necessary DIY task that homeowners should do regularly. Keeping the area around the outdoor unit clear of debris is another task that can help ensure proper airflow. Also, resetting a tripped circuit breaker or verifying thermostat settings are simple steps you can handle yourself.
However, if the issue involves refrigerant, electrical components, or internal parts of the unit, it’s best to leave it to professionals. Improper handling of refrigerant can pose serious health risks and even legal consequences due to environmental regulations. Electrical repairs, too, can be dangerous and should only be undertaken by certified technicians.
Calling in the experts also ensures that the problem is diagnosed accurately. What might seem like a simple issue on the surface could be a symptom of a more complex underlying problem. By relying on professional ac repair services, you can rest assured that your system is in capable hands, and you’ll avoid the risk of making the problem worse.
Understanding the Role of System Age and Sizing
Sometimes, the reason your AC isn’t cooling efficiently isn’t due to malfunction, but rather due to the age of the unit or incorrect sizing. Air conditioners typically have a lifespan of 10 to 15 years. As they age, their efficiency naturally declines. If your system is over a decade old and has required multiple repairs in recent years, it may be more cost-effective to replace it with a newer, more energy-efficient model.
Additionally, the size of your air conditioner relative to the space it needs to cool plays a crucial role. An undersized unit will struggle to keep your home at a comfortable temperature, running continuously without achieving the desired results. Conversely, an oversized unit will cool the space too quickly without adequately dehumidifying it, leading to a cold yet clammy atmosphere.
Proper sizing involves calculating the load based on your home’s square footage, insulation, windows, and other factors. This is not something that should be guessed or estimated—it requires a professional load calculation. If you suspect that your AC’s poor performance is due to improper sizing, it’s worth consulting with an HVAC expert who can evaluate your system and recommend the right solution.
Future-Proofing Your Cooling System
Once your current issues are resolved, the focus should shift toward preventing future problems. Implementing a long-term ac maintenance strategy will ensure your unit remains in peak condition year after year. Investing in a maintenance agreement with a trusted HVAC company can be a smart move, as these plans often include scheduled inspections, priority service, and discounts on repairs.
Additionally, smart thermostats can enhance your system’s efficiency by allowing you to program cooling schedules and monitor performance remotely. Some advanced models even alert you to maintenance needs or unusual activity within the system. These tools help you stay proactive rather than reactive, which is key to maintaining a comfortable and efficient home environment.
It’s also wise to keep an eye on your energy bills. A sudden spike could indicate that your AC is struggling and needs attention. The earlier you catch potential issues, the easier and cheaper they are to fix. Simple steps like sealing air leaks, insulating ducts, and using ceiling fans to circulate cool air can also support your air conditioner’s performance.
Lastly, don’t forget to consider environmental factors. Shading your outdoor unit with plants or a cover (without obstructing airflow) can help it operate more efficiently. Likewise, using blinds or curtains to block sunlight during the hottest parts of the day can reduce the cooling load inside your home.
Conclusion
Staying vigilant and informed is the best defense against an underperforming AC. Whether it’s making minor adjustments, performing routine maintenance, or calling in the pros for ac repair, each step you take contributes to a more comfortable and energy-efficient living space. The next time your air conditioner starts to falter, you’ll be equipped with the knowledge to act quickly and effectively, keeping your cool no matter how high the temperature climbs.
Need HVAC Services in St. Louis, MO?
Keep cool or stay warm with Ashley Brothers Heating & Cooling. Since 1999, Ashley Brothers have been providing residential and commercial services to the St. Louis and Jefferson County area. We specialize in the installation of new equipment, heating and cooling repair, and furnace cleaning. Craftsmanship is important, equipment choice is too. We work with only top brands like Amana, Goodman, York, and McLain. It is understandable that replacing or upgrading your equipment can be daunting. Ask us about financing. We repair all heating and cooling equipment brands. Heating and cooling repairs can happen at random, take advantage of our 24-hour emergency service. Call us today about your concerns.
If you’ve ever experienced the frustration of turning on your air conditioner only to feel warm air coming out of the vents, you’re not alone. A malfunctioning air conditioning system can leave you feeling hot and uncomfortable, especially during the scorching summer months. In this guide, we’ll explore why your air conditioner is blowing hot air and discuss common reasons why this might be happening.
Understanding the Problem
Importance of a Functioning Air Conditioner
Your air conditioner plays a vital role in keeping your home cool and comfortable, particularly during hot weather. When your air conditioner starts blowing hot air instead of cold, it can be a cause for concern and indicate underlying issues with the system.
Common Symptoms
Blowing hot air is just one of several symptoms that may indicate a problem with your air conditioning system. Other signs to watch out for include reduced airflow, unusual noises, foul odors, and leaks around the unit.
Reasons for Hot Air from Your Air Conditioner
Low Refrigerant Levels
One of the most common reasons why an air conditioner blows hot air is low refrigerant levels. Refrigerant is the substance responsible for cooling the air in your home, and when levels are low, the system cannot effectively produce cold air.
Refrigerant Leaks
Refrigerant leaks can occur due to wear and tear or damage to the refrigerant lines. These leaks not only lead to low refrigerant levels but can also cause damage to other components of the air conditioning system if left untreated.
Dirty or Clogged Air Filters
Dirty or clogged air filters can restrict airflow through the system, leading to reduced cooling capacity and potentially causing the air conditioner to blow hot air. It’s essential to replace or clean air filters regularly to maintain optimal airflow and system efficiency.
Faulty Compressor
The compressor is the heart of the air conditioning system, responsible for circulating refrigerant and cooling the air. A faulty compressor can result in hot air blowing from the vents and may require professional repair or replacement.
Electrical Issues
Electrical malfunctions or faulty wiring can disrupt the operation of the air conditioning system, leading to hot air blowing from the vents. It’s essential to have electrical issues addressed promptly by a qualified technician to prevent further damage.
Thermostat Problems
Thermostat issues, such as calibration problems or faulty sensors, can cause the air conditioner to malfunction and blow hot air. Verify that the thermostat is set to the correct temperature and functioning properly.
Troubleshooting and Solutions
Check Refrigerant Levels
If you suspect low refrigerant levels, have a qualified technician inspect and recharge the system as needed. It’s crucial to address refrigerant leaks promptly to prevent further damage to the air conditioning system.
Clean or Replace Air Filters
Inspect air filters regularly and clean or replace them as needed to ensure optimal airflow and system efficiency. Dirty or clogged air filters can impede airflow and cause the air conditioner to blow hot air.
Schedule Professional Maintenance
Regular maintenance by a qualified technician is essential for keeping your air conditioning system in top condition. Schedule annual inspections and tune-ups to identify and address any potential issues before they escalate.
Repair or Replace Faulty Components
If your air conditioner is experiencing compressor issues, electrical malfunctions, or other mechanical problems, it’s crucial to have these repairs addressed promptly by a professional technician. In some cases, component replacement may be necessary to restore proper functioning.
Conclusion
A malfunctioning air conditioner that blows hot air can be a frustrating and uncomfortable experience, especially during hot summer days. By understanding the common reasons why air conditioners blow hot air and taking prompt action to address any issues, you can ensure that your home remains cool and comfortable year-round. Whether it’s low refrigerant levels, dirty air filters, or compressor problems, don’t hesitate to seek professional assistance to diagnose and repair the problem. With proper maintenance and care, you can keep your air conditioning system running smoothly and efficiently for years to come.
Need HVAC Services in St. Louis, MO?
Keep cool or stay warm with Ashley Brothers Heating & Cooling. Since 1999, Ashley Brothers have been providing residential and commercial services to the St. Louis and Jefferson County area. We specialize in the installation of new equipment, heating and cooling repair, and furnace cleaning. Craftsmanship is important, equipment choice is too. We work with only top brands like Amana, Goodman, York, and McLain. It is understandable that replacing or upgrading your equipment can be daunting. Ask us about financing. We repair all heating and cooling equipment brands. Heating and cooling repairs can happen at random, take advantage of our 24-hour emergency service. Call us today about your concerns.
When the sweltering heat of summer hits St. Louis, having a functioning air conditioning unit is essential for staying cool and comfortable. However, like all mechanical systems, AC units are susceptible to various issues that can disrupt their performance and leave you sweating in the heat. In this blog, we will explore the most common problems with AC units in St. Louis and discuss potential causes and solutions to help you keep your home cool and comfortable throughout the summer.
1. Refrigerant Leaks
One of the most common problems that AC units in St. Louis face is refrigerant leaks. Refrigerant is the substance responsible for cooling the air in your home, and if there is a leak in the system, it can cause your AC unit to blow warm air or fail to cool your home effectively. Signs of a refrigerant leak include reduced cooling efficiency, ice buildup on the evaporator coils, and hissing or bubbling noises coming from the unit.
2. Dirty Filters
Clogged or dirty air filters are another common issue that can plague AC units in St. Louis. Over time, air filters in your AC unit can become clogged with dust, dirt, and debris, restricting airflow and reducing the unit’s efficiency. Dirty filters can lead to poor indoor air quality, reduced cooling capacity, and increased energy consumption.
To address this issue, regularly check and replace the air filters in your AC unit. It is recommended to replace filters every one to three months, depending on usage and air quality. By maintaining clean air filters, you can improve airflow, enhance cooling efficiency, and prolong the lifespan of your AC unit in St. Louis.
3. Thermostat Problems
Problems with the thermostat can also impact the performance of AC units in St. Louis. A malfunctioning thermostat can cause the AC unit to cycle on and off irregularly, fail to maintain a consistent temperature, or not respond to temperature adjustments. Faulty wiring, dead batteries, or incorrect settings are common causes of thermostat issues.
4. Frozen Evaporator Coils
Frozen evaporator coils are a common issue that can affect AC units in St. Louis, particularly if there is restricted airflow or low refrigerant levels. When evaporator coils freeze, it can cause the AC unit to blow warm air, produce a musty smell, or cause water leaks around the unit. Frozen coils can result from dirty filters, low refrigerant levels, or airflow obstructions.
5. Electrical Issues
Electrical problems are another common issue that can impact AC units in St. Louis. Faulty wiring, blown fuses, or damaged capacitors can cause the AC unit to fail to turn on, produce strange noises, or experience frequent power outages. Electrical issues can pose safety hazards and lead to system malfunctions if not addressed promptly.
6. Lack of Maintenance
A lack of regular maintenance is a common factor contributing to problems with AC units in St. Louis. Neglecting routine maintenance, such as cleaning, inspections, and tune-ups, can lead to dirty components, worn-out parts, and reduced efficiency in the system. Regular maintenance is essential for preventing issues, extending the lifespan of your AC unit, and maximizing cooling performance.
Summary
AC units in St. Louis are vulnerable to various common problems that can affect their performance and efficiency. From refrigerant leaks and dirty filters to thermostat issues and frozen coils, identifying and addressing these issues promptly is essential for maintaining a comfortable indoor environment. By understanding the common problems with AC units in St. Louis and seeking professional assistance when needed, you can keep your home cool and comfortable throughout the summer season. Prioritize regular maintenance, prompt repairs, and professional service to ensure that your AC unit operates efficiently and effectively when you need it most in St. Louis.
Need HVAC Services in St. Louis, MO?
Keep cool or stay warm with Ashley Brothers Heating & Cooling. Since 1999, Ashley Brothers have been providing residential and commercial services to the St. Louis and Jefferson County area. We specialize in the installation of new equipment, heating and cooling repair, and furnace cleaning. Craftsmanship is important, equipment choice is too. We work with only top brands like Amana, Goodman, York, and McLain. It is understandable that replacing or upgrading your equipment can be daunting. Ask us about financing. We repair all heating and cooling equipment brands. Heating and cooling repairs can happen at random, take advantage of our 24-hour emergency service. Call us today about your concerns.
As summer temperatures soar, air conditioning becomes a necessity. With the hot, humid weather, it’s important to ensure that your AC system is up and running correctly to keep your home comfortable. But, just like any other home appliance, your AC is prone to trouble, especially if it has not been well maintained.
Don’t wait until your system breaks down to address the issue. Instead, take a proactive approach to protect your AC against the summer heat. Here’s what you can do to ensure your AC runs efficiently throughout the summer months:
The air filter in your AC traps dirt, dust, and other particles, preventing them from circulating throughout your home. When the filter becomes clogged, it restricts airflow and reduces your system’s efficiency, which in turn makes it work harder to cool your home. A dirty filter expands your energy consumption and raises your energy bill. Change the filter every 30 days, or as recommended by the manufacturer, to keep your AC running smoothly.
3. Check Outdoor Unit
The outdoor unit is as important as the indoor one– if not more– and it’s therefore crucial to keep it clean and free of obstructions. Check around the unit to make sure that no debris or plants have grown too close to it, which can obstruct airflow. The unit should be placed away from direct sunlight but in an open area, ideally without surrounding walls or other barriers that may affect its performance.
4. Use Ceiling Fans
Using your ceiling fans instead of turning down your AC can significantly reduce your energy bills. Keep your ceiling fans on all day to circulate the cool air around your home. Ceiling fans can cool the air temperature by about 4 degrees, which can help you set your AC at a higher temperature without sacrificing your comfort.
5. Seal Your Home
Air leaks in your home can cause your AC to work harder, resulting in higher power consumption and increased costs. Check around doors and windows for any gaps or cracks and seal them using weatherstripping or caulk. You may also consider adding insulation in your attic to prevent cool air from escaping through the roof.
6. Install a Programmable Thermostat
After you have optimized your home for maximum efficiency, consider installing a programmable thermostat to regulate your AC. These thermostats can automatically adjust the temperature depending on the time of day and your room’s occupancy. You can save on electricity bills by adjusting your cooling requirements when you’re away. A programmable thermostat can make it easy to keep your home at the desired temperature, even when you’re not at home.
7. Install Blinds or Curtains
The sun’s rays can heat your home quickly, increasing your energy bill. To keep the heat at bay, install blinds or curtains on your windows to prevent direct sunlight from entering your home. This will ensure your AC system does not work harder than it should keeping your home cool.
8. Limit Heat-Producing Activities
Appliances that generate heat, such as an oven or stovetop, can significantly increase the temperature in your home during the summer. When possible, cook outside or use a microwave. The more heat you can prevent from entering your home, the easier it will be for your AC system to keep you cool.
Conclusion
Protecting your AC system during the summer requires a bit of effort, but the reward is worth it. A well-maintained system and optimized home will ensure that your AC runs efficiently and that your home remains comfortable throughout the summer months. Regular maintenance, replacing the air filter, keeping the outdoor unit clean, using ceiling fans, sealing the home, installing a programmable thermostat, installing blinds or curtains, and limiting heat-producing activities are just a few ways you can protect your AC in summer. With these tips, you can rest assured that your AC system will serve you well for many summers to come.
How To Protect My AC In Summer