Question about 2002 Chevrolet Silverado 2500HD

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Heat is blowing out of vent instead of cold air. looking for trouble tree regarding the blend door (not sure which one needs replaced) thanks

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Vacuum line going to switching valve leaking or not hooked up

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2002 ford explorer AC and heat blowing in dash, but very weak from the vents


On the motorcraft parts web site, you can blow up
a picture of the HVAC Blend Door Motors & locations,
as well as part numbers

You can get failed motor from Amazon

With knowing where the motors are located, try switching
the air flow modes manually, to see what positions do not work

Then you know what motors to replace

I also have professional scan tool software & can see the codes
for the motors in enhanced data.

The-- Vent Blend Doors-by name

Defrost-up top
Cabin -the vents as you say in the middle & on the sides
Floor
Recirculate-under the glove box
Blend Door -under the dash on your print

Mar 11, 2014 | 2003 Ford Explorer

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

---------

Ac vacuum line on dodge cummins?

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

---------

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

----------

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

It blows cold air out the driver side vents instead of warm air when the heat is turned up


Hello,
An all too common problem is the heat/air blend door in the climate control duct system. The blend door is either stuck, or you could have a bad actuator, ( the actuator is the device that moves the blend door based on your setting.)

I would likely have that checked first.

I hope this helps you.

Feb 10, 2011 | 2003 Hummer H2

2 Answers

Heater only blows hot air thru one vent - all other vents blow cold air


This is my best guess with out knowing the year of the vehicle.
If you have a climate control system, ( driver's side, and passenger side heat & a/c setting ), you likely have an issue with the blend door being stuck, or a bad actuater, ( this moves the blend door )

If you do not have a climate control system, you likely have a trap/flapper door sticking, or some blockage in the duct work.

I hope this helps you.

Feb 02, 2011 | Honda CR-V Cars & Trucks

1 Answer

Have a 1998 dodge caravan blows cold only new thermastst flushed system new anti freeze help


Most likely the problem is a broken blend door inside the heater box or a broken adjuster cable going to the blend door, the blend door inside the heater box is responsible for heater output depending on your temp adjustment on your heater control panel, most likely the blend door is stuck in the cold position allowing cold air to come through the vents verses allowing the blower motor to blow warm air past the hot heater core to produce heat, check the temperature adjuster cable behind your heater controls and make sure its connected and not broken, lastly make sure the blend door isnt broken and operating freely.

Dec 06, 2010 | 2000 Dodge Caravan

1 Answer

Driver side vents blow hot air when a/c is on and the pasenger side vents blow cold?what could be the problem?


This is very common, this is caused by a bad blend door motor, replace the driverside blend door motor and your problem is solved, you may have alittle trouble locating this motor,seeing that there are 3 to 4 of this motors operating diffrent door on the heaterbox, you would need to locate one by one and move all control settings until you find the one that doesnt move, important move all positions hot /cold defrost vents floor recirculate every setting.

Jul 12, 2010 | 2003 Chevrolet Silverado 2500HD

2 Answers

2003 mercury grand marquis LS heater does notr blow hot air, blower blows but cold air comes what is the problem


The blend door is stuck in cold position. That usually happens because the blend door actuator has failed.

You will need to test and replace the blend door actuator.

To replace the actuator you will need to take apart the dash and remove completely the instrument panel,d isconnect the connector, remove the four screws, remove the temperature blend door actuator and replace it.

The replacement is not a job for beginners, since you have to take apart the dash to access the actuator.

Regards.


Nov 18, 2009 | Mercury Grand Marquis Cars & Trucks

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