Why is My AC Freezing Up?
AC systems though durable and tough, built for the long haul, do have to be properly maintained and cared for. They are designed to run well under a specific set of circumstances. When things get out of balance abnormal wear and tear can cause problems leading to damage.
If for some reason the Freon in the system begins to expand more than it should it can cause the coils to become colder than usual. If something prevents the airflow over the coils, then the evaporator coil temperature can drop below freezing. At this point, the system will start to ice up.
If left running and unnoticed the whole system can freeze over and becoming that cold can cause expansion and damage the system.
The most common cause as to why air conditioners freeze up is a low freon level. When you have less freon it will expand more because there is less pressure. The greater expansion means a cooler temperature. When that temperature drops below freezing moisture in the air that comes in contact with the coil will freeze and form ice. If your system is beginning to freeze, check your freon. If it’s low, replenish it.
A secondary cause is a lack of airflow over the coil. Air conditioning systems are designed to draw warm air from inside the house pulling it across the coil to cool the air. It then returns that cooled air into the home. This transfers heat back to the coil, preventing it from dropping the temperature too low. But, if the airflow is restricted and not enough warm air can reach the coil, not enough heat will transfer. This can cause a drop in the degree which will cause the moisture from the air to form into ice.
*Occasionally there might be a leak in the ductwork or an obstruction restricting the air flow.
The most common cause of restricted airflow is easy to fix. It is simply a clogged air filter. Filters slide in and out with just one hand and can be found at any Lowe’s, Walmart, or Home Depot. Be sure to change your filters regularly every 1 to 3 months.
The worst-case scenario is a mechanical failure. A kink in the refrigerant line could restrict the freon, or a faulty blower fan might change the airflow. Additionally, running the air conditioner in outside temperatures below 62 or so degrees can cause the refrigeration system to drop in pressure and then run colder than it should. A qualified service technician should inspect the system for any mechanical or related problems.
If your air conditioner starts freezing up, or if you have any questions or problems with your air conditioner give us a call. Our technicians are on call 24/7! (239) 357-0727. You can also visit us online to learn more at www.alldayaircooling.com.
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