mercury grand marquis Blower only works on high and randomly selects vents.
Asked by Connie8954 Jul 02, 2016 at 03:30 PM about the 2006 Mercury Grand Marquis GS
Question type: Maintenance & Repair
Blower only works on high and randomly selects vents.
1 Answer
Blowers that only work on high usually from a bad blower resistor pack. Drop the glove box and remove the insert to get to the blower motor, the resistor pack sits on top of it and is easy to change. If you're getting "randomly selected vents" you may want to test the pin outs on the dash vent control with a voltage meter.
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