Your AC works hard to keep your house cool, so nothing’s more frustrating than when it stops working. Luckily, there are some easy AC Repair Round Rock steps you can try at home to get the cool air flowing again.
Start by checking your breaker panel. If your breaker is tripped, flip it back on.
1. Frozen Evaporator Coils
One of the most common AC repair issues that homeowners face is frozen evaporator coils. This is caused when dust and debris build up on the coils, blocking them from absorbing heat. Fortunately, there are several steps you can take to prevent this issue from occurring and minimize the damage that it causes.

If you notice ice on your AC unit, turn off the system and adjust the thermostat to the fan setting. This will allow the system to circulate air over the coils and help the ice melt faster. Also, be sure to place an old towel near the system to absorb any dripping water from the melting ice and avoid potential water damage to your home.
Another way to prevent ac coils from freezing is to ensure that there are no obstructions in the return vents. This can be a result of furniture or other items blocking the vents, as well as clogged filters. Changing your air filter frequently and using a basic pleated filter that allows for good air flow will help keep the evaporator coils clear of debris.
When you have a problem with your evaporator coils, it’s important to contact an HVAC expert as soon as possible. This will not only ensure that the problem is fixed quickly, but it can also help prevent additional problems from developing.
If the problem is not addressed promptly, it can lead to the evaporator coils becoming completely frozen. This can cause the refrigerant lines and other components of the system to freeze as well, requiring costly AC repairs.
Other signs that your evaporator coils are frozen include warm air coming from your vents, low indoor temperature levels, or hissing or bubbling noises from the system. A professional air conditioning technician can address these issues and determine the root cause of the problem to prevent it from happening in the future.
2. Service Valve Damage
Located at the bottom of your condenser, your AC’s service valve allows refrigerant to flow from the system’s condenser to the indoor unit without stopping the cooling process. While the function of this component is straightforward, it can get damaged by a variety of issues, including clogged inlet screens, incorrect bulb placement, contaminants in the valve, positioning problems, and even loss of power. When this happens, it can produce clanging and banging noises that are loud and unsettling. It’s a good idea to call for AC repair services right away if you hear these sounds.
Faulty expansion valves can also cause various AC problems, like inconsistent air temperature and frost on the evaporator coils. These issues often arise because of contamination, moisture, and improper installation. Regular cleaning and maintenance can help prevent these problems.
Your AC’s expansion valve is responsible for regulating the amount of liquid refrigerant that enters the evaporator coil. It’s important to understand this part of the process so you can recognize potential signs of a faulty expansion valve, such as insufficient cooling, high cabin temperatures, and unusual noises.
An air conditioner that’s blowing cold air but only in small quantities is a sign of a problem with the expansion valve. This means the valve isn’t properly controlling the amount of liquid refrigerant that goes to the evaporator coils. This can lead to a loss of cooling efficiency and increased energy bills, so it’s crucial that you take action when you notice this problem.
In most cases, it’s best to repair a faulty expansion valve rather than replace it. However, this decision depends on the severity of the problem and whether or not the valve is old. A repair can suffice if the valve has minor clogging or a refrigerant leak, but if the damage is extensive and affects the system’s performance, replacement might be a better option. If you’re not sure, an experienced technician can help you determine the best solution for your particular cooling needs. This is why it’s so important to have a dependable HVAC company in your corner.
3. Capacitor Damage
The air conditioner capacitor is a small but vital component that sends energy to the motor in your AC unit. It’s located inside the outdoor portion of your air conditioning system, also known as the condenser, and it can get damaged or wear down from daily use, weather, and other factors. If you notice the signs of bad AC capacitor symptoms, contact a professional to have it replaced so your cooling system can work as efficiently as possible.
Capacitors can overheat if your AC runs too hard for long periods of time. This puts a strain on the capacitor to keep up with demand for cool air, which can cause it to overheat and burn out. Regularly cleaning your coils and scheduling regular maintenance appointments can help reduce the stress on your AC capacitor during peak cooling times.
Like any electrical component, capacitors can be damaged by power surges. Lightning strikes and other power issues can overload the capacitor, causing it to burn out and fail. This is why it’s so important to protect your AC capacitor with a surge protector, which can absorb sudden spikes in energy and prevent them from harming your system or damaging the capacitor.
Often, the first sign of a failing capacitor is an unusual burning smell. As the capacitor overheats, it will produce smoke that can smell pungent or acidic due to the chemicals in it. If you notice this sign, shut off your air conditioner and call an HVAC technician to have the capacitor replaced before the problem gets worse.
A failing capacitor can also produce humming noises when it malfunctions. This is a surefire sign that you need to replace your air conditioner capacitor before the summer heat starts getting unbearable.
Capacitors aren’t indestructible, but they can last up to 20 years with proper maintenance and care. If yours is older than that, it’s likely time to have it replaced to keep your home comfortable and save on energy bills. An experienced professional will note the voltage and micro-Farad rating of your capacitor so they can find a new one that matches.
4. Damaged Fin
The fins on your AC unit are responsible for directing air flow inside and outside the unit. When they become bent or damaged, the air flow is interrupted, and it can cause your AC system to overheat. To avoid this, inspect the fins and condenser coils regularly for signs of damage. If you find that they are bent or have any other problems, you can use a fin comb to straighten them out and restore proper air flow. Make sure you clean the unit before you do this, and you may need to remove the protective grille from the unit to access the fins.
The fins are thin wavy metal pieces that cover the outside of your AC unit, and they help transfer heat. However, the fins can get bent or damaged, which causes your system to work harder to cool your home. This can lead to higher energy bills and reduced cooling performance.
A clogged or dirty air filter can also affect your AC unit’s performance. It can block airflow, causing the unit to overheat and shut off. This is a common AC problem that can be easily fixed by replacing or cleaning your air filter.
Other common AC issues include a frozen evaporator coil, loud noises, tripped breakers, and blowing hot or no air. Keeping your unit well-maintained will prevent many of these issues, as well as extending its life span.
If you have an older unit that has reached the end of its life expectancy, it may be time to consider a replacement. A newer AC system can be more efficient than your current one, and it will save you money on utility bills and repair costs in the long run. Contact us today to learn more about our comprehensive AC services. We can handle repairs, replace parts, and perform system optimizations to keep your unit in top condition. Our experienced technicians will be happy to answer any questions you have.