Finding frost or ice on your air conditioner is alarming and counterintuitive. A system designed to cool should not be turning to ice. When it does, it is a sign that something is interfering with normal operation.
What to Do First
Turn the system off immediately and switch the fan to ON to help the ice thaw. Running a frozen system can damage the compressor, the most expensive component. Never chip at the ice, which can puncture the coil. Let it melt completely before restarting.
Restricted Airflow
The most common cause of a frozen coil is poor airflow. A clogged filter, closed or blocked vents, or a failing blower motor prevent enough warm air from passing over the evaporator coil, so its temperature drops below freezing and condensation turns to ice. Replacing the filter resolves many cases.
Low Refrigerant
A refrigerant leak lowers the pressure in the system, which drops the coil temperature and causes ice to form. This requires a technician to locate and repair the leak, then recharge the system correctly.
Dirty Evaporator Coil
A layer of dirt on the coil insulates it and disrupts heat exchange, which can also lead to freezing. Professional coil cleaning restores proper operation.
Thermostat and Drainage Issues
Running the AC on very cool nights or a malfunctioning blower can contribute, and a clogged condensate drain can accompany freezing problems. A technician diagnoses the exact cause and corrects it.
Because freezing usually stems from airflow or refrigerant problems that get worse over time, professional diagnosis protects your system from costly damage.
Need Help From a Cooling Specialist?
Whether you need a repair, a tune-up or a new system, Emergency Cooling NJ is here to help homeowners across New Jersey. We offer AC repair, maintenance, installation and 24/7 emergency service in every NJ county. Call us at 862-660-7726.