When the weather gets hot, you expect your commercial air conditioner to keep your building cool and comfortable. When it fails, you may be confused as to why it is not working, especially if the AC unit is only a few years old. Commercial AC units can fail for a wide range of reasons, ranging from dirty air filters to broken compressors.
Is your commercial air conditioner not cooling? Here are some common reasons why AC units fail and why you should contact an HVAC professional for prompt repair.
Air Filter Needs to Be Replaced
One of the most common reasons why commercial air conditioners stop cooling is due to the air filter. An air filter is designed to trap and hold various contaminants and particles that may be airborne in your building. If you fail to clean or replace your air filter, it can become clogged with debris. A dirty air filter can reduce air-flow to the unit, preventing the AC system from circulating enough cool air to get the building to the desired temperature. In addition, a dirty air filter can cause the evaporator coil to freeze which then blocks air-flow.
The air ducts in a building are responsible for moving cooled or heated air through the building. However, when there is a hole or leak in the air ducts, cooled or heated air can escape before getting to the building’s interior. This is not only a comfort problem, but can also be costly due to wasted energy. Leaking ducts can also create air quality problems and the need for additional HVAC-related repairs.
Electrical issues are fairly common in commercial AC units and if not promptly repaired, can result in electrical failure. Some electrical issues are more minor, such as a loose wire or dirty fuse. Some can be more difficult to diagnose, such as a short in the wiring or a bad capacitor. If your electric bills have suddenly gone up, the AC unit may be to blame. You may also experience electrical problems with your commercial air conditioner following a storm or power outage. A HVAC professional can help diagnose the system and make any necessary repairs.
Air conditioners require ample airflow to keep the coils warm and working efficiently. When there is a blockage in air-flow due to a dirty filter or other reason, the temperature inside the AC unit drops which can lead to frozen coils. Common signs of frozen AC coils include an air conditioner that runs but does not cool, visible ice on indoor or outdoor coils, and more condensation in your building than normal due to moisture buildup.
Problem with Condenser Fan Motor
A central air conditioner has two main fans. The first is located inside and blows cool air into the building. The other is located outside and blows over the condenser coils to release heat from the building’s air. When the motor on either fan starts to experience problems, the system is not able to cool as efficiently or sometimes not at all. There are several reasons why the condenser fan motor may fail, such as capacitor issues, a loose or broken belt or the unit may not be receiving enough power. Fan motors can also burn out over time due to wear and tear.
A commercial air conditioner relies on refrigerant or “coolant” to keep the building cool. The refrigerant flows through the evaporator coils and cools the air that flows over the coils before sending the cooled air into the building. Once the level of refrigerant in the AC unit depletes, the AC can stop cooling efficiently. When this happens, it is important to call in an HVAC professional to refill the air conditioner unit with refrigerant.
The compressor inside of the AC unit is designed to circulate refrigerant between the inside and outside units. If the compressor breaks, it can no longer cool the building. Compressors can fail for a variety of reasons, such as when mineral deposits or dirt build up on the coils or when the suction lines become blocked. In some cases, a compressor can be repaired. However, a broken compressor may also need to be replaced which can be fairly expensive.
Contact the Commercial AC Repair Experts
It can be a frustrating experience to discover that your commercial air conditioner is no longer cooling. Fortunately, AC repair is available. If you find that your commercial air conditioner is no longer cooling efficiently, call in an HVAC professional to diagnose the unit. Cool Works Co. in Manhattan, NY offers residential and commercial HVAC services to surrounding homes and businesses. For more information about why your AC is not cooling, reach out to the cooling experts at Cool Works Co.