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What Causes An AC Unit to Ice Up?

Updated: Jul 25, 2023

Orange County summers are hot, and the last thing you would expect is an air conditioner that has iced up. However, when your AC has poor airflow or mechanical problems, it doesn’t matter how toasty it is outside, your AC will ice up and leave you hot and bothered.

Why Does AC Ice Up?

An air conditioner will freeze when the temperature in the evaporator coil in the condenser has decreased too much. The intake would normally receive the hot air and send it outdoors. When that hot air flow stops, the AC unit ices up.

Rather than removing the hot air from indoors, the coils transfer cold air. It causes ice to form on the system, and as the ice melts, the AC unit will start to drip.

Before your AC has a chance to ice up and cause you problems, schedule air conditioning maintenance in Orange County, CA.


What Are the Top Reasons an AC Might Ice Up?

Poor airflow is the major cause of air conditioners icing up, but there are also other causes:


Clogged Air Filters

If your air filters are clogged and dirty, the airflow will be interrupted.


Dirty Coils

If your AC has a dirty coil it will restrict the airflow.


Mechanical Failures

Bent refrigerant lines, a blocked condensate drain, or a malfunctioning blower fan, valves, or electrical wiring can cause your AC to ice up.


Refrigerant Leaks

Refrigerant is kept in a sealed unit inside the AC and it doesn’t get used up. If there’s a leak, your refrigerant levels will be low and will cause the AC to ice up.

There are numerous reasons that can cause an AC to ice up, and your local AC technician will examine your AC and provide a fast repair. The best way to prevent problems is with regular air conditioning maintenance in Orange County, CA.


Air Conditioning Maintenance in Orange County, CA

Coastal Heating and Cooling is the number one company for repairs and air conditioning maintenance in Orange County, CA.

Regular maintenance is preventative and will ensure that your AC is running efficiently over the hot summer months. Check out our affordable maintenance plans and call us today for professional AC repairs and maintenance.

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