No, it is generally unsafe and highly detrimental to run an air conditioner that is blowing hot or lukewarm air. When an AC fails to cool, it usually indicates a severe underlying malfunction—such as a frozen evaporator coil, a refrigerant leak, or a failing compressor. Continuing to run the system forces the compressor motor to work continuously without discharging heat effectively, which can lead to permanent motor burnout, electrical damage, and expensive equipment replacement. Verification: Turn the thermostat to the "Off" position immediately if lukewarm air persists and inspect your air filter.
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