HVAC Not Cooling: 4 Reasons Your Air Conditioner is Freezing Up

An air conditioner plays a key role in keeping your home cool and comfortable during the hot summer months. Keeping your air conditioner well-maintained is a great way to avoid many problems and maximize efficiency for your unit. However, you may notice that your AC unit is freezing up. Understanding the cause of this common problem is important in helping you solve this issue as quickly as possible.

Here are four common reasons for an air conditioner to freeze up.

#1 Lack of Airflow

One common reason for an air conditioner to freeze up is due to the lack of airflow. Over time, the condensation on the coil will eventually turn into ice because of inadequate airflow. The first step is to always check your air filter to see if it is dirty. You should always replace a dirty air filter to maximize airflow and keep your system working great. However, the lack of airflow may be due to other reasons, such as closed grates, blocked ducts, or closed dampers.

#2 Malfunctioning Blower Fan

The blower fan in your air conditioner plays a crucial role in removing hot air from your house while keeping your home feeling cool and comfortable. However, your blower fan may break or begin to not work properly. A malfunctioning blower fan alters the airflow and may result in condensation building up on the coils. The lack of hot air moving throughout your system will cause your refrigerant line to freeze. Scheduling an appointment with an HVAC tech is essential in replacing a blower fan as soon as possible to avoid additional damages.

#3 Not Enough Refrigerant

An air conditioner may also freeze up due to low refrigerant levels. A pressure change in your system can cause the refrigerant to act differently, which results in moisture condensing and freezing on the coils. Eventually, the buildup of ice will cause your air conditioner to not function properly. Contacting an experienced HVAC technician is always a good idea to help further investigate the issue and find a solution to this problem.

#4 Dirty Coils

A layer of dirt on your coils makes it more difficult to absorb water fast enough. Over time, this can cause the condensation to eventually turn into a large block of ice. Scheduling AC tune-ups twice a year is a great way to stay proactive and avoid this problem. An HVAC professional will ensure your coils stay clean while also checking for other issues to keep your system working great throughout the year.

An air conditioner may freeze up for various reasons, such as inadequate airflow, a malfunctioning blower fan, low refrigerant levels, or dirty coils. Understanding the cause of your problems is essential in getting your system working as quickly as possible. Calling an HVAC company is always a great option to help you resolve this issue as soon as possible and keep your home feeling great throughout the summer months.