Why Air Conditioners Freeze in Mild Arizona Winters

Nearly 90% of Arizona homes have air conditioners to help them cope with hot, dry summer conditions. During the colder months, air conditioners may freeze, causing damage and malfunctions. These systems must function optimally when needed. The following are the most common causes of air conditioner freezing and tips on preventing and fixing them.

• Insufficient airflow: Inadequate airflow is one of the main causes of frozen air cooling systems. Low airflow over your evaporator coils causes condensation, often resulting in ice. To remedy the situation, look for and address leaks or blockages in the ductwork. 
• Clogged air filter: Dirty and clogged air filters impede airflow, causing ice to form on your evaporator coil. To fix this issue, replace the air filter. 
• Insufficient refrigerant levels: Leaking or low refrigerant reduces system effectiveness and allows ice to build up in your system. Look for leaks and kinked refrigerant lines. As this is a serious issue and difficult to address, contact a trained professional for assistance.
• A damaged blower fan contributes to insufficient airflow and ice build-up and can cause serious issues with your HVAC system. You’ll need an expert capable of repairing and servicing your system.
• Clogged drain line: A clog in the drain line of your cooling unit causes the drip tray to overflow and water to build up in the system. This can lead to freezing, reduced efficiency, water damage around the unit, and complete shutdown. Clear/flush the condensate line to solve the problem. 

How To Prevent Your Air Conditioner From Freezing

Scheduled maintenance is crucial to avoiding difficulties with your HVAC system, including freezing. The following are preventative steps to ensure your system is working at maximum efficiency and to prevent issues. 

• Replace the air filter every 1 to 3 months. They are inexpensive and simple to install. 
• Clean the circulating fan, removing leaves, dust, debris, insects, etc. 
• Keep all vents open/clear and airflow unhindered.
• Regularly clean the condenser coils, ensuring they are free from debris. 
• Schedule an inspection by a trained technician.

How McMillin Air Can Assist

McMillin Air’s trained technicians can service/repair all models/makes of air conditioners. We offer annual inspections and regular maintenance to help keep your cooling/heating system working efficiently. Contact us for timely, affordable service. We also provide replacement air conditioners when needed.