Heater blows only from defrost?

Air only from defrost,no air from rear vents,only air from rear vents.

Ac heater problem.No heat,heater blows cold.

This are problem noticed by many others too.

In relation to this problem,there are few help links provided below.

Check the link below to go through its procedure to troubleshoot the problem :----------

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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Car Ac only blows through defrost vents?
http://technoanswers.blogspot.com/2012/01/forf-f150-ac-only-blows-through-defrost.html
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Why 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?
http://technoanswers.blogspot.com/2012/01/ac-vacuum-line-on-dodge-cummins.html
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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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AC air blows through defrost vent only on Diesel Engine?
http://technoanswers.blogspot.com/2012/01/ac-air-blows-through-defrost-vent-only.html
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Air flow selector not working and Air blows from defrost vent only?
http://technoanswers.blogspot.com/2012/01/ford-escape-air-flow-selector-not.html
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AC blows air out of defroster and floor vents only ?
http://technoanswers.blogspot.in/2012/01/ac-blows-air-out-of-defroster-and-floor.html
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Heater quits heat after few minutes?
http://technoanswers.blogspot.in/2012/02/chevy-equinox-quits-heat-after-few.html
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Clicking noise under dash and front defroster not working?
http://technoanswers.blogspot.com/2012/01/clicking-noise-under-dash-and-front.html
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Heater AC or defroster fan not working?

http://technoanswers.blogspot.in/2012/02/heater-ac-or-defroster-fan-not-working.html

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No heat on Oldsmobile Silhouette?

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

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

Car heater blowing warm, but not hot air?

http://schematicsdiagram.blogspot.com/2011/12/car-heater-blowing-warm-but-not-hot-air.html

See this below help links in related for faulty blower motor and blower motor issues :----

How to replace blower motor on Buick regal?

http://technoanswers.blogspot.in/2011/10/how-to-replace-blower-motor-on-buick.html

How to replace Blower Motor on Acura Car models?

http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-blower-motor-on-acura.html

Heater/AC blower motor not working on 1995 Isuzu Trooper?

http://technoanswers.blogspot.in/2012/02/heaterac-blower-motor-not-working-on.html

Replace blower motor?

http://repairhelpcenter.blogspot.com/2012/01/replace-blower-motor.html

How to replace blower motor fan assembly on 2000 GMC Yukon?

http://repairhelpcenter.blogspot.com/2012/01/how-to-replace-blower-motor-fan.html

Audi A4 blower motor blows Warm Air?

http://howtobyme.blogspot.com/2011/12/audi-a4-blower-motor-blows-warm-air.html

Heater stuck on defrost?

http://howtobyme.blogspot.com/2011/12/heater-stuck-on-defrost.html

Where is Blower motor resistor located on 2006 Ford F 250?

http://schematicsdiagram.blogspot.com/2011/12/where-is-blower-motor-resistor-located.html

Dodge Caravan AC Heater Control only works on high mode?

http://schematicsdiagram.blogspot.com/2011/12/dodge-caravan-ac-heater-control-only.html

Honda Civic Blower Motor Only works on high mode?

http://schematicsdiagram.blogspot.com/2011/12/honda-civic-blower-motor-only-works-on.html

How to Test and Replace Blower motor on car?

http://repairhelpcenter.blogspot.com/2011/12/how-to-test-and-replace-blower-motor-on.html

How to Replace Blower Motor Wheel?

http://repairhelpcenter.blogspot.com/2011/12/how-to-replace-blower-motor-wheel.html

How to Replace Blower Motor on 2008 Honda Odyssey?

http://howtobyme.blogspot.com/2011/12/how-to-replace-blower-motor-on-2008.html

Where is blower motor relay located on 2005 Ford F-350?

http://technoanswers.blogspot.in/2012/02/where-is-blower-motor-relay-located-on.html

Blower motor Resistor shorting problem?

http://schematicsdiagram.blogspot.com/2011/12/blower-motor-resistor-shorting-problem.html

How to replace blower motor on Plymouthbreeze?

http://technoanswers.blogspot.in/2012/02/how-to-replace-blower-motor-on-plymouth.html

A/C, heater, defroster fan, not working?

http://technoanswers.blogspot.in/2012/02/ac-heater-defroster-fan-not-working.html

Heater problem on Isuzu Trooper?

http://technoanswers.blogspot.in/2012/02/heater-problem-on-isuzu-trooper.html

Blower fan not running on Isuzu trooper?

http://technoanswers.blogspot.in/2012/02/blower-fan-not-running-on-isuzu-trooper.html

Heater makes clicking noise under dash on Ford Explorer?

http://technoanswers.blogspot.in/2012/01/heater-makes-clicking-noise-under-dash.html

Engine Overheats and heater blowing cold?

http://howtobyme.blogspot.com/2011/11/engine-overheats-and-heater-blowing.html

This will help.
Thanks.