An air conditioner does not freeze because of a specific outdoor room temperature, but rather when the temperature of the indoor evaporator coil drops below 32 degrees Fahrenheit (0 degrees Celsius). This sub-freezing coil temperature is typically triggered when outdoor ambient air drops below 60 to 65 degrees while the AC is running, or when severe airflow restrictions (such as a dirty filter or blocked vents) prevent warm indoor air from passing over the coils. When the coils drop below freezing, moisture in the air turns into solid ice. Verification: Monitor outdoor ambient temperatures and ensure they remain above 60 degrees before running your air conditioning system.
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