Heater/blower wont blow air. It works in the back, but not the front and the heat and a/c work, it just wont actually blow out the vents in the front.

There are several possible reasons why your blower, vent, defrost, AC, and heater might stop blowing air:

1. Blower Motor Failure: The blower motor is responsible for blowing the air through the vents. If the blower motor fails, you will not get any airflow from the vents.
2. Blower Motor Resistor Failure: The blower motor resistor controls the speed of the blower motor. If the resistor fails, the blower motor may stop working or only work at one speed.
3. Fuse or Relay Failure: A blown fuse or faulty relay in the blower motor circuit can prevent the blower motor from working.
4. Control Module Failure: The HVAC (heating, ventilation, and air conditioning) control module is responsible for controlling the blower motor and other components. If the control module fails, it can prevent the blower motor from working.
5. Vacuum Leak: If your vehicle uses a vacuum system to control the vents, a vacuum leak can prevent the system from working properly.
6. Broken Blend Door: The blend door controls the direction of the airflow. If the blend door breaks or gets stuck, the air may not flow through the correct vents.
7. Wiring or Connector Issues: Faulty wiring or connectors in the blower motor circuit can prevent the blower motor from working.

You need to clarify a little . No heater , or do you mean there is no air coming from vents . This would be a heater blower motor problem . Or is there air coming from the vents but it's cold , no heat ?

Help with heating issues, blend actuator - Interior - Dodge ...

www.dodgejourneyforum.com/.../5304-help-with-heating-issues-blend-a...

Jan 13, 2014 - My 2009 Journey R/T is only blowing hot air out the driver side vents, while the other vents (passenger and rear) are blowing cold air ... Thanks Frogbox....keep in mind that the info is for the 2009 model and I guess it also applies to2010's. 2009 journy sxt heat/cool issue
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In a 2010 dodge journey why heat comes out just one side

Is your heater blower motor working on all speeds ? Are you get any air coming from the rear vents ?

There is a resistor that goes out on the odyssey and pilots for the blower motor. Does it blow on full speed? Is it both front and back that don't work?

http://www.odyclub.com/forums/9-problems-concerns/66605-front-ac-blower-not-working.html

i hadsimale problems on my taho the ac wul not blow cold n the back only the heater would blow and the front would not blow i had to chang the front blower motor and the blower motoer relay in the back every thing is on the top of the rt pass wheel hump swap them out there the same parts to see what broke hat stuf is expencive hope this helps

If you can get cold air blowing out the front vents, the front heater door is not working properly. If you don't get air blowing out, check the front heater fan and its resistor block.

The blowers ion the back have there own blower motor. The front has it's own. The resister controls the range the blower motor runs on,( low, medium, high). If the blower motor is not working it may be the motor itself. Was the fuse checked:?

on the front blower make sure the fuse is ok if it is then check the relay if its good as well then youll ned to replace the blower motor. as far as the rear it sounds as if the air handler is not operating properly you need to locate it and ensure that nothing is blocking it from turning.hopes this helps you.

had this trouble in a dakota it was a blend door in the heater unit. had to remove entire dash to repair