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1988 chevy sprint Heater defrost and floor heater works but face heater blows out cold air

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This cars are not suppose to blow hot air to the face vents ,if you notice there is a blue arrow on the selector for face air

Posted on Mar 06, 2013

  • jesushightech Mar 06, 2013

    this cars are not suppose to blow hot air to the face vents ,if you notice there is a blue arrow on the selector for face air ,i opened the heater box on mine and there is no way it could route the air in a way to blow hot to the face i will post pictures later

  • jesushightech Mar 06, 2013

    this cars are not suppose to blow hot air to the face vents ,if you notice there is a blue arrow on the selector for face air ,i opened the heater box on mine and there is no way it could route the air in a way to blow hot to the face i will post pictures later

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Not sure if vent dors are vacuum or cable operated but id say the one for defrost is not working

Posted on Dec 11, 2012

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Posted on Jan 02, 2017

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SOURCE: Heat wont blow through heater or defroster vents

The door in the heater box is most likely stuck. It is located under the dash on the passenger side

Posted on Dec 06, 2008

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SOURCE: 1995 Chevy k1500 heater problems.

there is an electric motor that moves the linkage to change where the air comes out..its under the dash to the right of the gas pedal........the problem is likely the linkages form that motor to your blend door that directs the air.its called the Heater Blend Door Actuator
hope this helps.......Good Luck!

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Posted on Dec 14, 2008

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SOURCE: '98 Chevy S-10 Pickup heater blowing cold air

the temp door is located in a box behind the glovebox, the actuator is either under or above the box. if you remove the glove box you should be able to see it.

Posted on Feb 03, 2009

  • 20 Answers

SOURCE: 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.

Posted on Feb 23, 2009

morse008
  • 1111 Answers

SOURCE: 1996 chevy blazer my air on heater will not blow

the idea of the switch is run on vacuum and is not making contact with the switch it self either worn contacts in the switch itself **** as an obstruction as well or the vent door is stuck in just that position either behind the glove box or the ash tray are the vacuum lines one of them may be pinched off or the door needs a bit of help until you can free it up

Posted on Sep 08, 2009

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1 Answer

Chevy heater diagram1989 1500 p/up


That truck had two electric motors that change from hot and cold air and from vents, floor, and defrost. one is located on top or on the side (facing the seats, behind the center dash piece) of the air box in the dash, and the second is on the left side of the air box next to the radio module above the gas peddle. Had the same issue with my 88 Silverado and changed both. I dont think your problem is going to be the one near the gas peddle.

Nov 30, 2013 | Cars & Trucks

1 Answer

My heater does not blow in floor in a dodgeram 1500


the heater vacuum motor and lines needs to be checked.Also get the blend door checked.

NO HEAT ON FLOOR VENTS

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As per your problem mentioned. There are few solved help links to troubleshoot these problems. Go through the list and Click the link below:----

2000 Toyota Avalon: No heat on Passenger Side?

http://whatisbyme.blogspot.in/2012/05/2000-toyota-avalon-no-heat-on-passenger.html


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No heat on Oldsmobile Silhouette?


http://technoanswers.blogspot.in/2012/02/no-heat-on-oldsmobile-silhouette.html

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Heater blows cold?

http://schematicsdiagram.blogspot.in/2012/02/heater-blows-cold.html

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Heat blows cold on drivers side and hot on passenger side?

http://schematicsdiagram.blogspot.com/2011/12/heat-blows-cold-on-drivers-side-and-hot.html

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Hot air on the driver's side vents only?

http://repairhelpcenter.blogspot.com/2012/01/hot-air-on-drivers-side-vents-only.html

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Temperature gauge does not move and no heat when heater is ON?

http://technoanswers.blogspot.com/2012/01/temperature-gauge-does-not-move-and-no.html

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1992 Toyota Camry: A/C Control light Flashing and A/C not Blowing Cold?

http://technoanswers.blogspot.in/2012/04/1992-toyota-camry-ac-control-light.html

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No heat, blower blows only cold?

http://technoanswers.blogspot.in/2012/02/no-heatblower-blows-only-cold.html

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Ford F150 Ac only blows through defrost vents?

http://technoanswers.blogspot.com/2012/01/forf-f150-ac-only-blows-through-defrost.html

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Dodge A/C come out of defrost vents only?

http://technoanswers.blogspot.com/2012/01/dodge-ac-come-out-of-defrost-vents-only.html

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Ac vacuum line on dodge cummins?

http://technoanswers.blogspot.com/2012/01/ac-vacuum-line-on-dodge-cummins.html

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Ford ranger AC blows cold through defrost vents instead on cabin vents?

http://technoanswers.blogspot.com/2012/01/ford-ranger-ac-blows-cold-through.html

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2005 Chrysler PT Cruiser: A/C Blows Warm?

http://whoisbyme.blogspot.in/2012/06/2005-chrysler-p8t-cruiser-ac-blows-warm.html

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2009 Mercury Grand Marquis: A/C blows Cold From Defrost Vent Only?

http://whoisbyme.blogspot.in/2012/06/2009-mercury-grand-marquis-ac-blows.html

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AC not blowing through Vents on 2007 Chevy Trailblazer?

http://schematicsdiagram.blogspot.in/2012/04/ac-not-blowing-through-vents-on-2007.html

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Passenger side temperature is warm air out of dash vents?

http://schematicsdiagram.blogspot.in/2012/04/passenger-side-temperature-is-warm-air.html

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These will help.

Thanks.

Nov 28, 2012 | Cars & Trucks

1 Answer

04 Buick Regal Heater blows cold And will not cycle on defrost,floor or vent


if it doesnt switch you may have a vaccum leak, but i work for a junk yard and we seel alot of heater controls for this car you may want to get a new or used one from a junk yard

Mar 26, 2012 | 2004 Buick Regal

1 Answer

On my sons 2000 chevy silverado 4.8 liter....the heater works fine....but when i switch control to defrost....only cold air blows out defrost vents....any help would be appreciated.


the heater & defroster baffles are controlled by electic motors that open and close the baffle (doors) to let the air to the heater and defroster vents. the motor must be bad

Jan 12, 2010 | 2001 Chevrolet Silverado

1 Answer

Heater only blows cold air and only out the window defrost. need to know how to change to get hot air? what to do to get floor and defrost would be nice also. This is a 1988 jeep cherokee 4.0 Thank you!


Make sure there is vacuum going to the heater box servo motors and the temp control. If you have a good vac signal then either the servo has failed or a plenum door is stuck. If there is no vacuum then check at the control and at the engine and trace to find reason.

Nov 26, 2009 | 1988 Jeep Cherokee

2 Answers

When i have the heater/defroster on the heater below blows cold air while the defrost blows hot. when i switch to just defrost the bottom heater stays on and blows cold air. when i have front dash and...


It sounds like you have a blend air door stuck. This is in the housing of the heater a/c blower unit under the passenger side of the dash. There is a motor on the top of the housing that could possibly be stuck or on working.

May 10, 2009 | 2003 Dodge Durango

2 Answers

'98 Chevy S-10 Pickup heater blowing cold air


the temp door is located in a box behind the glovebox, the actuator is either under or above the box. if you remove the glove box you should be able to see it.

Feb 01, 2009 | 1998 Chevrolet S-10 Pickup

1 Answer

93 ford festiva heater only blows cold air.


The heater only blows HOT air when set on defrost or floor settings. If you have the lever set for vent, only cold air will come out. Check to make sure you set the controls to floor or defrost. This is standard for all Festiva's.

Nov 13, 2008 | 1992 Ford Festiva

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