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If you are asking for a 1996 or newer model year, it is located just below the dash on the driver's side above the OBDII port. It is not hard to access. Drop the lower dash panel for light access and uncouple the harness clips. Slip it back and replace with the new one.

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13y ago
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15y ago

Take it to the mechanic.

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Q: How do you replace 2003 grand marquis climate control unit?
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