Why Do Air Conditioners Freeze Up?

May 13, 2021
Frozen Air Conditioner in Canada

Did you know that an air conditioner can freeze? A frozen AC doesn’t function optimally and might not blow any air. Hiring Comfort Masters Ltd. helps ensure the optimal functioning of your heating, cooling, and ventilation system. Comfort Masters Ltd. has been serving Oshawa, York, and Durban for over 15 years. Below are facts that will help you understand why air conditioners freeze up.

How Does an AC Produce Cold Air?

An AC unit has a coil featuring cold refrigerants. Warm air is required to keep the coils warm while blowing cold air into your indoor spaces. An air conditioner is fitted with indoor and outdoor coils. The indoor coil absorbs hot indoor air and transmits it to the outdoor coil, which blows it outside your home. The indoor coils rely on hot air for smooth functionality. In the absence of warm air, the coil will become extremely cold, hence freezing up.

High humidity levels aggravate the AC freezing problem. A high humidity level causes excessive moisture in your indoor air. When blown to the indoor coils, the moisture turns into ice. Homeowners detect the problem after spotting the crawling ice on the AC outdoor compressor. Here are some of the significant causes of frozen air conditioning systems:

Little to No Airflow

Zero or very minimal airflow is the number one reason why air conditioning systems freeze up. Without airflow, warm air stops flowing through and over the cold refrigerant or the coils. As a result, the coil will start freezing up. Several reasons can contribute to the lack of airflow, such as clogged ductwork and air filters. At Comfort Masters Ltd., we offer ventilation services that help improve airflow.

Excessive Dust

It would be best if you had the air filters of your AC replaced often. There is a high tendency of homeowners neglecting their vent systems, which can clog easily. When ductwork is overlooked, dust tends to pile up on the coils, causing a thick blanket. The thick blanket works as an insulator, trapping the cold air inside. With no cold air blowing in the indoor spaces, humidity levels tend to increase, which can result in the AC freezing.

Faulty Blower Fan

Your AC has a blower fan that makes it possible to blow cold air inside and warm air through the coils and outside. Your AC will function optimally when the air pressure balances with the airflow. A damaged blower fan can impair this balance, which can cause the system to freeze.

Tips to Enable You Avoid a Frozen AC

It’s disappointing when your AC fails to cool your house due to a frozen coil. You should, therefore, take precautionary measures to ensure optimal functionality. Here are some actions to employ:

Examine Refrigerant Leaks

Comfort Masters Ltd. has specialists equipped with skills and experience with AC systems and will help examine possible refrigerant leaks. The level of the refrigerants in the coils matters greatly, and if it is low, freezing becomes a reality. Our technicians will examine your AC to determine whether there are any refrigerant leaks and, if so, avail necessary repairs or replacements. Refrigerant leaks should always be assessed by a qualified professional. You should never try to do it yourself.

Change the Air Filters Regularly

Clogged and dirty air filters impair the airflow, which contributes to the freezing air conditioning unit. Therefore, you need to have your air filters changed regularly. Consequently, indoor air quality and airflow levels will increase. There is a need to have the air filters replaced quarterly or, where possible, once a month.

Have Your Ductwork Cleaned

How you maintain your ventilation system determines the quality of the indoor air and the airflow levels. Therefore, consider hiring HVAC technicians who will help clean and unblock your vents. It would be best if you positioned furniture away from the vents to avoid blocking airflow. There is a common misconception that closing some of the vents helps save energy bills as less cooling is necessitated. However, closing the vents accelerates the problem, causing unwanted AC coils and refrigerant replacement expenses.

Connect With the Professionals

Is your air conditioner frozen? Are you interested in furnace or boiler installation? Call us today and have our team of professionals examine your unit and identify the culprits. Comfort Masters Ltd. has highly experienced experts specializing in heating, cooling, indoor air quality, and fireplace installation and maintenance services. Our team takes pride in keeping you happy and comfortable. We are always at your service, regardless of what day or time you need help.