Yes, it is extremely bad and damaging to run an air conditioner with an active leak. If you operate a system with a refrigerant leak, the loss of pressure causes indoor evaporator coils to freeze solid into blocks of ice, placing catastrophic strain on the compressor motor and risking permanent burnout. If you run a system with a water leak, overflowing drain pans will cause continuous structural water damage, ruining drywall, warping flooring, and fostering toxic mold growth. Verification: Switch your indoor thermostat mode to "Off" immediately upon discovering any leak to protect your home and equipment.
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