Having problems with your 2004 Mercury Grand Marquis ?
AC will not come out the dash vents all the time. Can lower the fan speed really low and they will sometimes switch back to the dash. All air is coming out the defrost vent.
My ac vent only comes out of the defroster and the floor i replaced the vent door accuator but that didnt work what could be the problem 2004 gand marquise
Check fan relay! and also make sure switch doors are functioning properly! hope this helps!!
Repair Help & Product Troubleshooting for 2004 Mercury Grand Marquis
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