Unexpected AC Failures: What Causes Them and How to Avoid Them

As the temperatures rise in the Dallas-Fort Worth Metroplex, the last thing you want is for your air conditioning system to break down unexpectedly. Unfortunately, AC failures are a common issue that homeowners face, and they always seem to happen at the most inconvenient times—usually during a heatwave when you need cool air the most. At Texas Air Authorities, we understand how frustrating these situations can be. In this article, we’ll explore the most common causes of unexpected AC failures and provide tips on how you can avoid them to keep your home comfortable year-round.

Common Causes of Unexpected AC Failures

Air conditioning systems are complex, with many components working together to provide cool air. When one part malfunctions, it can cause the entire system to fail. Here are some of the most common causes of unexpected AC breakdowns:

1. Dirty Air Filters

One of the most frequent culprits behind AC failure is a clogged or dirty air filter. Over time, air filters trap dust, dirt, and debris, which can restrict airflow. When airflow is limited, your AC system has to work harder, which can cause it to overheat and eventually break down. Dirty filters can also lead to frozen coils, which further damages the system.

2. Low Refrigerant Levels

Refrigerant is the substance that absorbs heat from the air and cools it down. If your AC is low on refrigerant, it won’t be able to cool your home effectively. This can lead to higher energy bills, and in severe cases, the system might fail entirely. Low refrigerant levels are often caused by leaks, which can be hard to detect without a trained technician.

3. Electrical Issues

Air conditioners have various electrical components, such as the thermostat, compressor, and fan motor. These parts are crucial for your AC’s operation. If any of these components malfunction, your system could stop working. Wiring problems or a blown fuse can also lead to a complete failure. Electrical issues are more likely to occur as your AC system ages, so it’s important to stay on top of maintenance.

4. Compressor Failure

The compressor is responsible for circulating the refrigerant in your air conditioning system. If the compressor fails, the refrigerant can’t move through the system properly, causing a complete system breakdown. Compressor issues are typically caused by poor maintenance, dirty coils, or an electrical failure. Since replacing or repairing a compressor can be costly, it’s essential to address issues early to prevent this type of failure.

5. Frozen Coils

Frozen evaporator coils are a common problem when airflow is restricted or when the refrigerant level is low. When the coils freeze, the system is unable to absorb heat from the air, which can cause your AC to stop working. Frozen coils can be caused by dirty air filters, low refrigerant levels, or a malfunctioning blower fan.

How to Avoid Unexpected AC Failures

While some AC issues are beyond your control, there are several steps you can take to prevent unexpected breakdowns and extend the lifespan of your system. Here are some helpful tips:

1. Schedule Regular Maintenance

The most effective way to prevent unexpected AC failures is by scheduling regular maintenance with a professional HVAC company. At Texas Air Authorities, we recommend having your system inspected at least once a year, preferably before the summer months. During a maintenance visit, our technicians will clean the coils, check refrigerant levels, inspect electrical components, and ensure that everything is working properly. Regular maintenance helps identify potential problems before they lead to expensive repairs or system failure.

2. Change Your Air Filter

To prevent clogged filters, make sure to change them every 1–3 months, depending on your system’s needs and whether you have pets or allergies. Clean air filters help ensure proper airflow, reduce strain on your AC, and improve air quality in your home. If you’re unsure how to change the filter, our technicians can show you how during a routine maintenance appointment.

3. Keep the Area Around Your AC Unit Clear

Ensure that the outdoor condenser unit is free from debris, such as leaves, dirt, or branches. This unit needs proper airflow to release the heat it absorbs from your home. Blocked airflow can cause the system to overheat and lead to potential failure. If you notice that your unit is covered in debris, clear the area and inspect the unit for any visible damage.

4. Monitor Your Thermostat

Sometimes, the cause of an AC failure is as simple as a malfunctioning thermostat. If your thermostat isn’t reading the temperature correctly, it could be signaling your AC to work harder than necessary, leading to wear and tear on the system. If you notice your AC acting erratically, consider having the thermostat calibrated or replaced by a professional.

5. Check for Leaks

If you notice a drop in your AC’s cooling efficiency, it could be due to refrigerant leaks. Although it’s hard for homeowners to spot leaks, it’s a good idea to watch for signs of refrigerant issues, such as warm air blowing from the vents or ice on the evaporator coils. If you suspect low refrigerant, contact a Texas Air Authorities technician to inspect and recharge the system.

Conclusion

At Texas Air Authorities, we know how stressful unexpected AC failures can be, especially during the hot summer months. Our NATE-certified technicians are here to help you avoid these problems with professional maintenance and repair services. With over two decades of experience serving the Dallas-Fort Worth Metroplex, we’re committed to keeping your home cool and comfortable.

We offer same-day appointments, free estimates, and a 1-year warranty on all new equipment. Don’t wait until your AC breaks down unexpectedly—schedule your maintenance today and keep your system running smoothly all year round!