Wat causes air to flow thru defroster vents instead of dash vents

Asked by Guru97PJW Jul 26, 2017 at 10:12 PM about the 2009 Mercury Grand Marquis LS

Question type: Maintenance & Repair

2009 Grand marquis, blows cold air but only thru defroster and floor.

2 Answers
110

GuruZ5LGZ answered 6 years ago

If your control is digital it may need to be replaced. They have a history of going bad and blowing through the defroster and floor are signs of it needing replaced.

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