Question about 1987 Chevrolet V10

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A/C is blowing out of the floor vent instead of the dash vents

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The vacuum motor in the blend door is not working right. May have to replace the blend door motor or check for vacuum hoses working themselves loose from the actuator.



Posted on Aug 04, 2010

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Posted on Jan 02, 2017

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2 Answers

When I excelerate my ventilation panel inside the cab starts blowing air out of the floor vent instead of blowing out of the front panel.


there is a vacuum can under the hood and if that is not hooked up or has a leak there is no vacuum reserve for the vent control valves so they go bad to a fail safe position

Aug 11, 2012 | 1990 Dodge Dakota

1 Answer

2007 chrysler town and country a/c blows cold through floor and defrost vent but not dash vents


Often a sign of a blend door problem. The blend door or doors are in the heater a/c box behind the dash.

Jun 28, 2012 | Chrysler Town & Country Cars & Trucks

1 Answer

Ac vents not working


There is a blend door acuator which moves when u change your settings. Its a electric motor. Down under dash, Will need a mech and a heating and cooling diagram to find where the motor is,

Jun 13, 2012 | 2007 Ford Sport Trac Limited

1 Answer

A/c blows cold but comes out of the defroster instead of dash


check vacume lines to and from heater switch

Aug 23, 2009 | 1983 GMC Jimmy

1 Answer

Dash vents will not blow air. Defroster and floor vents blow fine.


Is it a new vehicle? I had a new vehicle that had the same problem. Answer was that the holes weren't punched out of the vent.

May 23, 2009 | 2004 GMC Envoy

1 Answer

A/c blows from floor


sounds like two problems. the ticking sound is probably a broken blend door stop. the wet floor is probably a bad heater core, both require dash removal.

May 20, 2009 | 2001 Cadillac DeVille

1 Answer

Heat wont blow through heater or defroster vents


common problem, check under dash by the gas pedal if control arms are muving went selecting from ac to heat cuz this it is the control for the vents to go from ac to heat and to defrost.

Jan 18, 2009 | 1997 Chevrolet K1500

2 Answers

The air cond blows out of the floor instead of the vents


i dont know if you have checked the vacuum lines underneath the dash but my truck was doing it after i replaced the heater core and i come to find out that it was the vacuum line that comes through the fire wall that was disconnected. after i hooked it back up it started working right again.

Aug 12, 2008 | 1998 Dodge Dakota

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