AC Repair in San Antonio, TX

During summer, you need your AC unit in good condition to provide adequate cooling for a comfortable home environment. The AC motor is an essential component of your cooling system. When it isn’t working efficiently, it can significantly affect the whole system’s performance and warrant replacement. Here are a few signs of AC motor trouble to help you make a more informed decision about your next steps.

Weak or No Airflow From the Vents

Weak airflow is often the first indication that the motor is having a hard time pushing sufficient air through the ducts to reach the desired temperature conditions for your house. This can result from various factors such as dust and debris buildup on the motor or a problem with the electrical connection. If there isn’t any air coming from the vents, it’s likely caused by an AC motor that has failed completely. However, other issues can lead to airflow problems, so it’s important to reach out to a professional to inspect the system.

Unusually High Energy Bills

When your AC motor is struggling, it must work harder to do the same job. In addition to increasing wear and tear, this also results in higher energy bills. In some cases, AC motors can also develop mechanical problems that cause them to draw more power than usual for a short period. If you’ve noticed a sharp increase in your energy bills, it’s essential to have your AC motor inspected by a professional and replaced, if necessary, to prevent high energy bills.

Strange Sounds

Strange sounds emanating from the unit is another sign of an AC motor problem. This often indicates a problem with the bearings or belts and is typically the result of debris buildup or a lack of lubrication. In some cases, a professional can resolve the issue by simply cleaning and lubricating the bearings and the belt. However, if the damage is more severe, it may be necessary to replace the entire motor.


When an AC motor begins to overheat, it shows that the motor needs replacement. The most common cause of overheating is a buildup of dust and debris on the motor’s windings. This can cause the windings to overheat, causing the insulation to break down and eventually leading to failure.

In some cases, the overheating may be a problem with the motor’s bearings. If the bearings aren’t correctly lubricated, they can seize up, causing friction and heat buildup. If an AC motor is frequently overloaded or operated in a hot environment, it’s more likely to overheat frequently, reducing the overall efficiency and leading to premature replacement.

AC Running Intermittently

If your AC unit runs intermittently, it may be time for a motor replacement. Issues with intermittent operation could be caused by the motor overheating and cutting out. Electrical problems can also cause an AC motor to stop working correctly. A loose wire or a short in the motor’s windings are common culprits for a motor that continually turns on and off.

The Fan Won’t Start

If your AC unit is turned on but the fan isn’t spinning, that’s a sure sign there’s an issue with the motor. An air conditioner running without the fan circulating air will eventually freeze over at the evaporator coils. Once this happens, your AC unit is at risk of other issues, so it’s important to reach out to an HVAC professional as soon as possible.

What Can You Do to Troubleshoot Your AC Unit

If you have a bad fan motor or a failed AC capacitor, you should always contact an HVAC professional for repairs or parts replacement. However, there are a couple of steps you can take to rule out other possible causes of the problem.

Sometimes, the issue could simply be a tripped breaker, especially if your air conditioner isn’t turning on at all. Another possible cause of AC performance issues is a dirty air filter; clogged filters restrict airflow. After checking the breaker and filter and finding no problems, it’s time to take a look at the outside AC condenser unit. If you can hear a humming sound from the compressor operating but can’t see the fan turning inside, the motor is likely faulty. That’s when you need to call in the pros for repairs.

If your AC motor needs replacement, MD Air Conditioning & Heating in San Antonio is ready to help. We provide a full range of repair services for air conditioners and heating systems. Our team also installs and maintains them. In addition, you can turn to us for indoor air quality and commercial HVAC services. Contact us today for more information or to set up an appointment.

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