AC freezing is a common HVAC glitch. A frozen AC unit malfunctions and fails to cool your space effectively. You know that your air conditioner is frozen when it starts blowing hot air instead of cooling your home. But what causes an AC unit to freeze?
Blocked Airflow
Inadequate airflow can cause your AC unit to freeze. When airflow is restricted, no air is moving through the AC system to prevent condensation from accumulating on the evaporator coil. If there is anything blocking airflow over the coil, it will get too cold and freeze.
In most cases, the restricted airflow is as a result of dirty filters and sometimes closed supply registers. To make sure your AC unit does not freeze, you should consider replacing your air filters regularly and keep the supply registers open when running your AC unit. A professional will help you replace air filters, and advise you on the right filters to use, depending on the applicable AC system you’re using.
Low Refrigerant
If your AC system is low on refrigerant, the pressure will drop in the unit, and similarly, the temperature also falls. This problem exposes the evaporator to too much cold, and it freezes. The presence of a low refrigerant level is mainly a sign of a leak, which means your AC unit requires repair or replacement depending on age.
Faulty Thermostats
Faulty thermostats can force an AC unit to run continuously, causing the condenser temperature to drop below freezing. This not only causes your AC unit to freeze but also wastes energy and money.
Low Drainage
Without proper drainage, condensed water remains inside the air conditioner and will eventually freeze. Water vapor condenses into a liquid during cooling, which then drains outside or into a drain pan. Frozen coils will block the drain hole and can instigate a primary freeze concern. Typically, leaves, debris, or pest activity can as well block AC drainage, which will freeze your AC unit. If you suspect poor drainage, you should contact an expert to help you unclog your AC drain to avoid freezing.
What to Do When Your AC Freezes
If you have a frozen AC unit, there are a few things you can do to remedy the situation, including:
Switching off the air conditioner—Once you notice that your AC unit is frozen, the first thing you should do is switch it off and give it time to defrost. After defrosting, you can then go ahead and check the filters and ductwork.
Checking the filter—Dirty air filters will block airflow and cause your AC unit to freeze. Therefore, consider checking and replacing your filters regularly. While you can order a filter from your local shop and replace it on your own, it is advisable to work with AC experts to ensure you get the suitable filter and proper installation.
Inspecting the ducts—It is essential to check for any collapsed ductwork. Collapsed or dirty ductwork can restrict airflow, which will result in AC unit freezing. Inspecting ductwork requires professional hands, and you will need to hire AC installation industry experts. They have the right tools and experience to handle such inspection and ensure the ducts are clean and functional.
Calling experts—If your AC unit keeps on freezing, it is vital to seek help. AC installation professionals will help you inspect your unit and determine the cause of freezing. Whether the ductwork is clogged, or the filters are dirty, the experts know what to do and will offer a lasting solution.
Time for a Checkup
Whether your AC unit is freezing or malfunctioning, it is crucial to have it inspected. At Kelly’s Heating and Cooling Inc. We have qualified experts that will help you diagnose your AC unit and offer you a lasting solution. We are a reputable AC company with over 20 years of industry experience. We will help you with all your AC problems and ensure that your home is comfortable. Contacts us today at 801-282-9952 and experience our exceptional services.
