Question about 2003 Mercury Grand Marquis

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Air condition will not cut off

My 87 year old father's vehicle, the Grand Marquis; the AC/blower will not cut off, unless the car is cut off completely. The second he turns the key, everything comes on. I just came back from the vehicle myself, and even though I attempted to cut off the system, the blower continued at full speed. I checked fuse 15 and 23, which according to the owners manual, were the fuses associated with the AC, and they were fine.
Do you have any suggestions before I call the dealer? My father and I thank you in advance.
Jeff

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Hi try removing the battery terminals for 15 mins and see what happens it may reset it to its original state just a suggestion let me know if you need more help

Posted on Jun 17, 2008

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Air condition blower doesnt work in 2003 mercury grand marquis


Removal & Installation To Remove:
  1. Disengage the wire harness connectors from the retainer.
  2. Disconnect the blower motor electrical connector.
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To Install:
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  2. Place the blower motor in the housing and install the screws.
  3. Connect the hose to the blower motor.
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  5. Install the electrical connectors in the retainer.
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