July 15, 2020

When your AC system falls out of balance, it could suddenly stop sending out conditioned air. If you feel warm air blowing from your vents, something is definitely going on. Here are the three main reasons an air conditioning system will freeze up.

Blocked Airflow

When your air conditioner unit can’t get enough airflow, there won’t be enough heat to keep condensation on the evaporator coil from turning into ice. You should check to make sure the air filters aren’t dirty, which prevents proper airflow.

If that isn’t the problem, check that you can feel air coming from your vents. This will help you identify closed dampers and blocked ducts that are preventing proper airflow throughout your AC system. Other reasons for a lack of airflow include a bad blower motor and low voltage to the fan.

Low Refrigerant

A frozen air conditioner can be caused by low refrigerant levels. Low refrigerant means low pressure, which results in “flashing” (liquid refrigerant turning to gas) occurring too early and the coils freezing over. Ice builds up until your entire outdoor AC unit is potentially filled with it.

J.J. Agnello Heating & Air Conditioning Inc performs annual maintenance services for clients throughout Erie, PA, and the surrounding areas. One of our technician’s tasks is to make sure your air conditioning unit has the right amount of refrigerant.

Dirty Coils

Dirty evaporator coils are the third main cause of your air conditioning system freezing up. Coils cool and dehumidify your air. They pull water out of the air, which is then supposed to fall into a drip pan. Built-up dirt can interrupt this process.

If the coils are dirty, they can’t absorb water fast enough to prevent it from freezing. Things can spin out of control until a solid block of ice has formed.

J.J. Agnello Heating & Air Conditioning Inc is a locally owned company that replaces, maintains and repairs air conditioners and heating systems. We also provide indoor air quality and duct cleaning services. Contact us today to find out more or schedule an appointment.

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