DOES NOT WORK ON AC OR HEAT
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2005 Mercury Grand Marquis Question: AC AND HEATER FAN NOT WORKING
Answer #1Visitor, July 03, 2011, 06:51
Most likely it is the blower resistor. I have a 2005 Grand Marquis, the resistor has went out twice. It is recommended not to run the fan on the lowest speed as the fan is used to cool the resistor.