Question about 2001 Dodge Ram 3500 Truck

1 Answer

Blend door not working.

My blend door is not working. I get no air to the front vents and the air is diverted to the defroster. Air will switch to floor. This was an intermediate problem but is now pretty much stuck. How is the blend door actuated. How difficult is the blend to access to repair?

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  • Jeff Sep 23, 2008

    Maybe the more correct term is the heat/defrost door that sits next to the blend door. I do not believe it to be a switch control issue as you can tell the the system attempts to do the right thing and all other functions work fine. I think that something found it's way into the unit and is preventing the door from functioning properly. Like I mentioned, it would work intermittenly.

    I ran into a Chrysler service manager a year or so ago and we briefly discussed what was happening and he said "blend door". Did not have a chance to talk about how difficult the job would be to get in there to clean it up or find the problem. I have the factory service manual and it has more warnings about what not to do than explaining how or what to do.

    Thanks

    Jeff

  • Anonymous Mar 13, 2014

    The blend door is not working right or the in car air temperature sensor is faulty. Removal & Installation Air Inlet Door Vacuum Motor To Remove: Remove the instrument panel. Remove the air inlet door motor mounting screws. CAUTION Do not attempt to bend any part of the air inlet duct door lever. Rotate and remove the air inlet door vacuum control motor. To Install: Rotate and install the air inlet door vacuum control motor. Install and tighten the mounting screws. Install the instrument panel. Defroster Door Vacuum Motor To Remove: Remove the passenger air bag module from the instrument panel. Disconnect the vacuum line and remove the mounting screws. CAUTION Do not attempt to bend any part of the defroster airflow mode door lever. Rotate and remove the vacuum control motor from the defrost door lever. To Install: Rotate and install the vacuum control motor on the defrost door lever. Install and tighten the mounting screws. Connect the vacuum line to the vacuum control motor. Install the passenger's air bag module. Floor Console Register Duct Vacuum Motor To Remove: Remove the floor console. Remove the right-side instrument panel insulator. Working from the passenger's footwell, disconnect the vacuum hose. Remove the screws and the floor console register duct vacuum control motor. CAUTION Do not attempt to bend any part of the floor console register duct door lever. Rotate and remove the vacuum control motor from the floor console register duct door. To Install: Rotate and install the vacuum control motor on the floor console register duct door. Install and tighten the mounting screws. Connect the vacuum hose to the floor console register duct vacuum control motor. Install the insulator under the dash. Install the floor console. Panel/Floor Door Vacuum Motor To Remove: Working through the driver footwell, remove the two screws and the shield. CAUTION Do not attempt to bend any part of the airflow mode door lever. Label and disconnect the two vacuum hoses. Remove the mounting screw. Lift, rotate and remove the panel/floor door vacuum control motor from the door lever. To Install: Install the panel/floor door vacuum control motor on the door lever. Install and tighten the mounting screw. Connect the vacuum hoses in their original positions. Install the shield on the vacuum motor. Auxiliary Air Distribution Blend Door Actuator To Remove: Remove the right rear quarter trim panel access panel. Auxiliary climate control housing removal and installation Remove the auxiliary air distribution blend door actuator screws. Disconnect the auxiliary air distribution blend door actuator connector. To Install: Connect the auxiliary air distribution blend door actuator connector. Install the auxiliary air distribution blend door actuator screws. Install the right rear quarter trim panel access panel. Auxiliary Temperature Blend Door Actuator To Remove: Remove the right rear quarter trim panel. Auxiliary climate control housing removal and installation Disconnect the temperature auxiliary temperature blend door actuator connector. Remove the temperature auxiliary temperature blend door actuator screws. Remove the temperature auxiliary temperature blend door actuator. To Install: Install the temperature auxiliary temperature blend door actuator. Install the temperature auxiliary temperature blend door actuator screws. Connect the temperature auxiliary temperature blend door actuator connector. Install the right rear quarter trim panel. --- In-Car Temperature Sensor Removal & Installation To Remove: Remove the instrument cluster finish panel. Disconnect the in-vehicle temperature sensor connector. Disconnect the in-vehicle temperature sensor aspirator tube. Remove the in-vehicle temperature sensor screws. Remove the in-vehicle temperature sensor. To Install: Install the in-vehicle temperature sensor. Install the in-vehicle temperature sensor screws. Connect the in-vehicle temperature sensor aspirator tube. Connect the in-vehicle temperature sensor connector. Install the instrument cluster finish panel.

  • Anonymous Mar 14, 2014

    Is there a blend door

  • Anonymous Mar 17, 2014

    Mechanic says it is the blend door.
    How difficult is it to get to it?
    How much does it cost approximately?

  • Anonymous Mar 17, 2014

    2008 altima blend door actuator

  • Anonymous Mar 21, 2014

    how to recalibrate blend door actuator

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  • Dodge Master
  • 61,037 Answers

The bleed door controls air temp not where it comes out, dash, floor, defroster, this is most likely a mode control switch problem, that switch is on the ac control head.

Posted on Sep 23, 2008

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  • 512 Answers

SOURCE: Blend door not working.

check the vacuum supply and vac lines from the control head for a leak

Posted on Nov 13, 2008

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Vacuum controls this circuit and leaks will cause blend air door to default to defrost. Check for bad check valve or hose leaks under hood first as these are the easy ones to get at and under hood heat causes deterioration.

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Do an internet search for "blend door repair" - - - the blend doors direct air thru the heater core and evaporator core along with the vents.

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The most common cause is the blend door actuator. It's the door that diverts air between the floor, vents, and defroster. Sometimes the part will get stuck in 1 position. Some cars have cable driven blend doors, others are electronic.

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Section 12-02: Heating and Defrosting 1998 Windstar Workshop Manual
REMOVAL AND INSTALLATION Actuator Motors, Electric Temperature Blend Door
Removal
  1. Remove cassette storage box or center shelf unit, if equipped.
  1. Remove instrument panel ash receptacle (04810) by depressing service lever.
  1. Disconnect electrical harness connector from electric blend door actuator.


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  1. Remove three retaining screws.


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  1. Carefully pull electric blend door actuator outward and off A/C evaporator housing (19850) assembly.
Installation
  1. Follow removal procedure in reverse order.
  1. Air temperature control door shaft is keyed. Move door to properly insert electronic actuator shaft. Make sure the shaft is completely in and properly seated.

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