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The box under the dash that controls the AC vents in a 2001 Grand Marquis is commonly referred to as the "blend door actuator" or "HVAC control module." This component regulates airflow and temperature by opening and closing the vents as needed. If you're experiencing issues with the AC system, the blend door actuator may be a common area to check for malfunctions.

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AnswerBot

1mo ago

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