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Blower motor always high front and rear

Air doors work properly however the front and the rear blower motor only work on high. The rear blower motor also only works on high independent from where it is controlled from.

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Look in the fuse panel there is a fuse for blower high and blower low check the one for blower low the location is on the inside of the fuse box lid

Posted on Mar 27, 2013

  • 1 more comment 
  • db_melo
    db_melo Mar 27, 2013

    there was only a frnt blower and rear blower fuse. both of them were good

  • db_melo
    db_melo Mar 27, 2013

    There is a fuse called room. It was blown. Replaced it now it works fine. The airbag light was also on. Glad that the dealer won't be seeing my money for this one. Thanks Homer.

  • David Denninger Jun 08, 2013

    My airbag light is on and the blowers are stuck on high. what did you do to fix them?

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Anonymous

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SOURCE: 05 Dodge Caravan Front blower doesn't work but rear blower works

I had the same problem, I changed the resistor that is located behind the glove compartment and it is all good now. That resistor doesn't look like a resistor when you look at it. To reconise this item, there are two connector attached to it, the one from the blower motor on which there is a green wire and a black wire. The other connector attached to the same resistor consist of 4 wires of diff colors.

Posted on Aug 25, 2009

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Anonymous

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SOURCE: Front heat does not work, rear heat does?

I'm just a regular diy'er, no training. Had same problem, 2001 Suburban, front blew cool air when heating, rear heat warmed up nicely. After reading other posts on other boards, took off the the heater hose clamps (make sure you remember which is which) at the firewall. With low pressure garden hose flushed left inlet/outlet first till I got good flow, then the right side, and back to left. Reattached hoses, started and tested. Heat blows just fine. I can't think of anything that could be damaged by this, but check with someone who know something first before trying it on your vehicle, but it worked for me. So far so good.

Posted on Oct 25, 2009

Testimonial: "Tried this simple solution and it worked perfectly. Who knows how much repair money I saved, thank you."

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No Front Heat 2003 Dodge Caravan - Tried most everything


If I am understanding you correctly, the blower fan is not running. You will need to take things apart until you can get to the blower itself. (Or you could test for voltage at the blower control switch) But I am guessing it is the blower that has gone bad, not the switch. However, they usually get noisy, and then go bad. Test for 12 volts going into the blower motor. If you have voltage at the blower motor, and it doesn't run, replace the blower motor.

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most resistor blocks bolt to the fan housing, be causes its air cooled
and must be near fan actual so it always is cooled. see?
i just looked,its there. dead center blower case.(fsm book)
alldata.com
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if fan fails on high too, its not the resistor, because on high
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2004 CHEVY SUBURBAN FRONT A/C WORKS BUT THE REAR DOESN'T TURN ON


There is a blower motor control processor for the back blower - it takes input from the front control and the rear control and decides the fan speed. That processor could be faulty, or the blower motor, or a 30amp fuse in the engine compartment.
In the front system you have a controller and blend doors that direct air thru the heater core and evaporator. You would need to check the operation of those blend doors.

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Where is the blower motor... i know that is the problem, but where and how do I change it. i already have the part


Blower Motor Removal & Installation Front To Remove:
NOTE: The blower motor is positioned on the passenger side of the vehicle beneath the instrument panel, and can be removed from the vehicle without removing the HVAC housing.
  1. Before servicing the vehicle, refer to the precautions at the beginning of this section.
  2. Remove or disconnect the following:
    • Negative battery cable
    • Passenger side cowl trim panel
    • Carpet to access the front upper screw that secures the air inlet housing
    • Recirculation door actuator
    • Recirculation door actuator wire lead from the routing clip located on the lower air inlet housing and position the wire lead aside
    • Blower motor wire lead connector from the blower motor resistor or power module, depending on application. Lower Air Inlet Housing chr_pacific_lwr_inlt_hsng.gif

    • One screw (from the top) that secures the lower air inlet housing to the upper air inlet housing
    • Four screws (from the bottom) that secure the lower air inlet housing to the upper air inlet housing and remove the lower HVAC housing Blower Motor Wire Lead Grommet chr_pacific_blwr_wrg_grmmt.gif

  3. Feed the rubber blower motor wire lead grommet through the opening in the lower air inlet housing.
  4. Push the blower motor wire lead through the opening in the lower air inlet housing and remove the lower air inlet housing from the vehicle.
  5. Place the recirculation-air door as needed to access and remove the three screws that secure the blower motor to the lower half of the HVAC housing.
  6. Lightly bend the recirculation air door far enough down to remove the blower motor and wheel from the HVAC housing. Blower Motor Mounting Tabs blwr_mnting_tabs.gif

  7. Remove the blower motor and wheel from the HVAC housing. Make a note of the location of the blower motor mounting tabs.
To Install:
  1. Install or connect the following:
    • Blower motor and wheel to the lower half of the HVAC housing and line up the blower motor mounting tabs to the correct location on the HVAC housing
    • Blower motor and wheel into the HVAC housing by lightly bending the recirculation-air door far enough down
    • Three screws that secure the blower motor to the HVAC housing by positioning the recirculation-air door as needed
      1. Torque to: 17 inch lbs. (2 Nm)
    • Blower motor wire lead through the opening in the lower air inlet housing and seat the rubber grommet into the lower air inlet housing
    • Recirculation-air door pivot into the lower air inlet housing
    • Four screws (from the bottom) that secure the lower air inlet housing to the upper air inlet housing and the lower HVAC housing
      1. Torque to: 17 inch lbs. (2 Nm)
    • One screw (from the top) that secures the lower air inlet housing to the upper air inlet housing
      1. Torque to: 17 inch lbs. (2 Nm)
    • Blower motor wire lead connector to the blower motor resistor or power module, depending on application
    • Recirculation door actuator wire lead into the routing clip located on the lower air inlet housing
    • Recirculation door actuator
    • Carpet
    • Passenger side cowl trim panel
    • Negative battery cable
  2. Perform the heater-A/C control calibration procedure.
Rear To Remove:
NOTE: The rear blower motor and blower wheels are repaired only as a balanced unit. The entire blower motor and wheel assembly must be replaced if either component is fault or damaged.
  1. Before servicing the vehicle, refer to the precautions at the beginning of this section.
  2. Remove or disconnect the following:
    • Front center floor console cover
    • Negative battery cable Rear Blower Motor Housing chr_pacific_rear_blwr_hsng.gif

    • Body wire harness connectors from the rear blower motor power module and the rear mode door actuator
    • Body wire harness bracket from the console support bracket
    • Eight screws and the two console support brackets from the floor console base and duct assembly
    • Four screws that secure the rear blower motor housing to the floor console base and duct assembly
    • Rear blower motor housing and place it on a bench
    • Rear blower motor wire harness connector from the power module
    • Eleven retaining clips and three screws that secure the housing together
    • Two halves of the housing
    • Blower motor wire harness and grommet from the housing and remove the blower motor
To Install:
  1. Install or connect the following:
    • Rear blower motor into the housing and install the blower motor wire harness and grommet
    • Two halves of the rear blower motor housing and install the eleven retaining clips and three screws
      1. Torque to: 17 inch lbs. (2 Nm)
    • Rear blower motor wire harness connector to the rear blower motor power module
    • Rear blower motor housing into the floor console
    • Four screws that secure the rear blower motor housing to the floor console base
      1. Torque to: 17 inch lbs. (2 Nm)
      2. Two console support brackets onto the floor console base
      3. Eight screws that secure the support brackets to the floor console base
        1. Torque to: 17 inch lbs. (2 Nm)
      4. Body wire harness bracket onto the console rear support bracket
      5. Body wire harness connectors to the rear blower motor power module and the rear mode door actuator
      6. Negative battery cable
      7. Front center floor console
  2. Calibrate the A/C-heater control.
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