Question about 2001 Ford Taurus

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I have a problem with the heater in my 2001 Ford Taurus. When the vehicle warms up an I turn the heater on it will blow hot air for just a short while then it turn cool. From what I can remember the problem started happening all at once and not more an more over time. I don't believe it is the heater core or thermostat since it starts out blowing hot air and then turns cool and also the inlet and outlet hoses at the at the firewall are both hot. I read something about a stratification door that may not be staying closed. Can some tell me how to test this theory and detailed insturctions on how to replace the door. Hopefully if I can get to it I can test it or check it to see if it is working properly.

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  • patrick_rive Nov 13, 2010

    I did not see a straightforward way to test it given there 8 connectors so I took the $60 chance and replaced it. Unfortuneately the problem is still there. Any other ideas? I found a TSB 02-23-6 bulletin about climate control concerning the stratification (secondary) blend door issue but it does not seem to fit the symptons exactly.

  • patrick_rive Nov 17, 2010

    I did not see a straightforward way to test it given there 8 connectors so I took the $60 chance and replaced it. Unfortuneately the problem is still there. Any other ideas? I found a TSB 02-23-6 bulletin about climate control concerning the stratification (secondary) blend door issue but it does not seem to fit the symptons exactly.

  • patrick_rive Nov 17, 2010

    Varying the temperature with the air conditioner on does change the temperature of the air coming out. It is very cold all the way on blue and just cool on red but not hot or even warm. I replaced the temperature blend door but that did not help. The search for resistor did not turn up much and I don't see anything that looks like its plugged into the duct work. Any other ideas to locate and replace the resistor?

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  • Ford Master
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I am going to say you have a Temperature resistor that has gone bad. Sounds like the Resistor for the blend door opens completely when it senses heat. This part can be one which looks like a wire placed in the Ductwork or it may be soldered in the Control head.

Try your Air conditioner function and see if it will hold a steady Temperature as you vary the degrees.

If you have a Digital Control head I know some have a Diagnostic routine.which will diagnose the problem. The Codes are separate from the engine and onboard computer scans. The Control heads have a sequence which needs to be entered by pushing some of the buttons on the face of the Climate Control. Its different for the manufacturers and model of the car.

You can try a Web search or ask a Dealer for the instructions for your Year and Model car. I believe the Air condition repair shops would have to know about these settings. You might be able to talk a shop into running your Diagnostic and get an estimate for the repair. Then fix it yourself.

Posted on Nov 14, 2010

  • fordexpert Nov 17, 2010

    Try About.com and Pdfoo.com for reference diagrams. If you have Digital Head on the A/C there is a Diagnostic loop. Since your A/C did respond to the temperature control change at least one of your blend doors is working. The resistor may be on the ductwork(firewall) under the hood and not the one from the blower motor.

    I know you said you have flow through the heater hoses. If there is a Vacuum control on the heater valve; do you have a Vacuum in the line? The resistor may control a Vacuum solenoid for the heater valve.

    I hope to have pointed you to some help on this. Would like to know the resolution please.

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  • Master
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Hi!!
It certainly seems like it is the door blend actuator. You are lucky that in this vehicle it is right outside the blower motor/evaporator housing. To check it, remove door blend actuator and test it. Here is how to remove it and a diag. of it's location.

  1. Disconnect the negative battery cable.
  2. Remove the lower trim panel from the passenger side of the instrument panel.
  3. Disengage the trim panel from the passenger side of the center console.
  4. Unplug the wire harness connector from the blend door actuator.
  5. Remove the four retaining screws from the blend door actuator.
  6. Remove the blend door actuator from the evaporator housing.
  7. The installation is the reverse of the removal.

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Good Luck!
A HELPFUL - 4 THUMBS - rating for this solution would be greatly appreciated. Thank you for using FixYa.

Posted on Nov 13, 2010

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