Question about 1998 Ford Explorer

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02 explorer.no heat,makes thumping noise when temp turned to heat

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  • litebrite216 Sep 26, 2008

    I have a 2005 that does the same thing and came across this page while looking for some help. I definitely will not buy another Ford!

  • Anonymous Oct 15, 2008

    I have a 2004 with the same problem. I am wondering if there is a switching relay that allows either heat from the engine or cold air from the a/c compressor through the heater core. I took out the console and exposed the heater core and could feel the clicking sound from within, but could find nothing causing it. There did appear to be some type of white switch of some kind on the left side of the heater core behind the dash panel.

  • pkeetz1 Oct 16, 2008

    me too i have not taken it apart but will soon let yall know

  • Anonymous Oct 17, 2008

    i have the same problem.it will only blow cold air and it clicks like crazy

  • drew_v2004 Oct 17, 2008

    i have the same problem. it blows cold air and clicks

  • djguero913 Jan 04, 2009

    heater thumps when heat is turned on and blows out cold air



  • Anonymous Feb 08, 2009

    I have the same problem in my chevy truck. When turning the key in the ignition to on, I get a thumping sound.

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  The concern lies in the temperature blend door. Most likely if it is clicking the door is broken where the motor shaft (the motor that actuates the door) goes into the door. Replace both the door and motor ( unfortunately from Ford the whole heater box needs to be replaced) or an aftermarket such as Dorman may have the door separate.  The entire dash needs to be removed for the repair so it is quite costly.

Posted on Oct 18, 2008

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I have an 02 doing the same. it just blows cold air and clicks

Posted on Oct 17, 2008

  • drew_v2004 Oct 19, 2008

    i fixed the problem in a couple of hours this weekend. the drivers side, counsel kicker is where i found the accuator. i took it out...then took it apart and seen that the plastic gears in it were chewed off. it cost $75 at the dealer. put it back in and the door works fine

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I have a 02 passat when I start If up it sound like a truck. What do you think it can be. Its not turbo it just started doing it


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For step by step troubleshooting this problem, I suggest you to refer the help links mentioned below. Its a complete solution with proper explanation to identify the cause of problem: ------


Click the link below: -----

Car makes clicking noise?

http://howtobyme.blogspot.com/2011/11/car-makes-clicking-noise.html

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Car makes whining noise like driving on rough pavement?

http://howtobyme.blogspot.com/2011/12/car-makes-whining-noise-like-driving-on.html

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Chirping Noise From Car?

http://technoanswers.blogspot.com/2011/11/chirping-noise-from-car.html

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What are the possibilities for Clicking noise in car?

http://technoanswers.blogspot.com/2011/11/what-are-possibilities-for-clicking.html

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Squealing at start up on car?

http://technoanswers.blogspot.com/2012/01/squealing-at-start-up-on-car.html

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http://technoanswers.blogspot.in/2012/01/chirping-sound-coming-from-engine.html

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Vehicle making Clunk Thump Thud noise?

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http://schematicsdiagram.blogspot.com/2012/01/4x4-truck-makes-roaring-noise-in-front.html

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http://technoanswers.blogspot.com/2012/01/clicking-noise-under-dash-and-front.html

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http://repairhelpcenter.blogspot.com/2011/12/car-brakes-making-noise.html

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The front heat selector for my 2003 windstar does not work, it is loose and all I get is cold air, the rear heating works fine.


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There are two white colored boxes, one is for the temp plenum door, the other the upper/lower air flow. To be sure, do what I did, turn on the ignition, rear ac/heat and listen for the obnoxious click/thump as you move the temp control from full heat to full cool, you will know which part. Disconnect the electrical connector, four bolts and it is out!

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2 Answers

Heater works great but a/c wont blow.


If I understand your problem, your heat works, but no A/C. It sounds like the blend door motor is not moving the door to the cool position. This could be caused by a bad blend door motor, or a bad interior temperature sensor. Because you said you heard a banging noise, it sounds like the blend door is stuck. The interior temp sensor would make no noise.

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