Question about 1999 Ford Expedition

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Crazy a/c My a/c in my 1999 expidition works when it wants to! it will blow cold air for an hour and without changing any settings it will start blowing hot air! this is only in the front my rear a/c works properly.....

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  • Ford Master
  • 4,369 Answers

Try this first. The aspirator grille is on the instrument panel and looks like a tiny regidter, maybe 1 1/2 inch by 1 inch.

Check for proper connection of the in-car temperature aspirator tube. Refer to the following Service Procedure for details.
SERVICE PROCEDURE

  1. Cut a piece of toilet paper or tissue paper about 3.7x3.7 cm (1.5x1.5") (paper towel will not work).
  2. Turn the key on and turn fan speed to HIGH.
  3. Select PANEL or VENT mode.
  4. Place the piece of tissue paper over the aspirator grille opening in the bezel. If aspiration (suction) is present, the tissue paper should stick to the aspirator grille.
  5. Turn the fan OFF. The tissue paper should fall off.
  6. If the tissue paper falls off the aspirator grille while the fan is on HIGH, check that the aspirator tube is properly connected at the right bottom corner of the front heater. The black connector on the white flexible tube should be snapped over the black tube connected to the heater plenum. Also, check for kinks and cuts in the aspirator tube.

Posted on May 24, 2009

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Posted on Jan 02, 2017

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