2003 GRAND MARQUIS WITH NO HEATING

  • Tiny
  • pinkbunnymr
  • 2003 Mercury Marquis
  • V8
  • 2WD
  • automatic
  • 70,000 miles

I have a 2003 Grand Marquis that is blowing air but will not get hot. I've checked the thermostat, anti freeze, and fuses. From what I gather there is a blend door valve that is prone to going bad and is coincidentally expensive to replace. Where is it and can I force it manually without replacing it?

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Friday, November 26th, 2010 AT 7:10 PM

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  • Tiny
  • rasmataz
  • Member

Check the heater control valve and the heater core-if okay then deal with the air blend door/vacuum and actuator

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Friday, November 26th, 2010 AT 7:15 PM

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