Air conditioning units are incredibly useful when it comes to keeping our homes and workplaces comfortable during hot weather, but sometimes they can experience issues that affect their performance. One of the most common problems that air conditioning units face is frost buildup on the unit’s evaporator coils. When this happens, it can impact the unit’s ability to cool effectively and even damage the equipment over time. There are several possible causes for the air conditioner freezing over and understanding them can help you take steps to prevent the issue from occurring. With this in mind, we at Air Supply Heating & Air Conditioning would like to share these causes.

Dirty Air Filter

A dirty air filter can cause the evaporator coils to become coated with debris and dust, which can lead to frost buildup. When the coils are covered with dirt, they can’t effectively transfer heat from the air passing over them, which can cause the temperature to drop and eventually lead to frost accumulation. To prevent this, you should change your air filter regularly, usually every three months or so.

Low Refrigerant Levels

Refrigerant is the substance that helps an air conditioning unit cool the air passing over the evaporator coils. If the refrigerant levels are too low, it can cause the coils to become too cold, leading to frost buildup. Low refrigerant levels can be caused by a leak in the system, and it’s essential to have a professional HVAC technician locate and repair any leaks to prevent this issue from occurring.

Faulty Thermostat

If the thermostat in your air conditioning unit is not functioning correctly, it can cause the evaporator coils to become too cold and lead to frost accumulation. This is because the thermostat is responsible for regulating the temperature of the unit and telling it when to turn on and off. If it’s not working correctly, it can cause the unit to run longer than necessary, leading to excessive cooling and eventual frost buildup.

Poor Airflow

If the airflow in your air conditioning unit is restricted, it can cause the evaporator coils to become too cold and lead to frost accumulation. Restricted airflow can be caused by a dirty air filter, clogged ductwork, or even furniture blocking the unit’s vents. To prevent this issue, you should ensure that your air conditioning unit has adequate space for airflow and keep the vents clear of any obstructions.

Faulty Defrost Sensor

Most modern air conditioning units come with a defrost sensor, which helps prevent frost buildup on the evaporator coils. If this sensor is not working correctly, it can cause the unit to continue cooling even when frost has accumulated on the coils. This can lead to further frost buildup and eventually damage to the unit. It’s essential to have a professional HVAC technician inspect and repair any faulty defrost sensors to prevent this issue.

Central Air Conditioning Diagnosis, Repair, Replacement, Maintenance & More in Summerlin, North LV, Henderson, Centennial, Enterprise, Lone Mountain Village, Paradise, Sunrise Manor, Spring Valley, Aliante, Desert Shores, Eldorado, Peccole Ranch, Silverado Ranch, Tuscany Village, Whitney, Winchester & Las Vegas Nevada

The frost buildup on air conditioning units can be caused by several factors, including a dirty air filter, low refrigerant levels, faulty thermostats, poor airflow, and faulty defrost sensors. By understanding these causes, you can take steps to prevent frost accumulation and keep your air conditioning unit running smoothly. It’s also important to have regular maintenance performed by a professional HVAC technician to catch any potential issues before they become significant problem. When you need air conditioner repairs, or any other services in the Greater Las Vegas, NV area, contact Air Supply Air Conditioning and let us assist you!