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- - heater blows cold air (https://www.mercuryforum.com/forum/grand-marquis-14/heater-blows-cold-air-2974/)

dberger1

May 31, 2009 12:48 PM

heater blows cold air

1999 Mercury Marquis LS with automatic
climate control. Heater fan works, cold air
only. Where do I start?

TIA, Don

87_Crown_Vic

May 31, 2009 01:13 PM

either blend door isnt working right or the heater core is blocked or clogged.

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