Operating a standard central air conditioner when outdoor temperatures drop below 60 degrees Fahrenheit (15 degrees Celsius) is generally considered too cool and can cause severe mechanical damage. Running an AC in chilly outdoor weather causes the refrigerant pressures inside the system to drop drastically, leading the indoor evaporator coils to freeze into solid blocks of ice. This ice buildup can flood the compressor with liquid refrigerant and burn out the motor. Verification: Check outdoor ambient temperatures before running your cooling system to ensure it stays above 60 degrees.
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