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Blend door or vacuum line?

Discussion in 'A/C & Heater systems - HVAC' started by Knetdude, July 24, 2011.

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    1. SCoup

      SCoup New Member

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      City, State:
      Davidson, NC
      Year, Model & Trim Level:
      2004 Ford Explorer
      Easy Fix

      I drilled a hole through the left over nub on the lever. Then connected to lever to the vacuum rod with a wire tire. Worked like a charm!
       
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    3. balgame03

      balgame03 New Member

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      City, State:
      Aldie, VA
      Year, Model & Trim Level:
      2003 Ford Explorer
      Blend Door not fully closing for Heat

      I've read all of the threads on this chain and cannot seem to figure out my issue. I just replaced the blend door actuator on my 2003 Ford Explorer. It seems to be working as the door moves when switching between hot and cold. However, when I switch to full hot/warm, the door does not close all the way, causing only room temperature "heat" to come out. Does anyone know what is causing this issue, or how to fix it?

      Here is a link to a video I shot of what can be seen from inside the glove box door. There are tons of youtube videos of the temporary fixes for broken blend door actuators by just pushing down the tab to the door within the glovebox, and then sometimes zip tying it down or some sort of temporary fix (just youtube ford explorer blend door actuator, and you'll see what I'm talking about). My door doesn't click or anything, it just does not shut all the way as you'll see in the video. I did not narrate the video, so here's an explanation.

      First, the video is essentially upside down because of the way I had to hold the camera phone. The video starts with the thermostat in full heat mode. I then turn it to cold, and you will see the arm start going and then sort of flick up then continue on to rest against a little silver metal "nipple" looking thing. You can hear it still working, and it takes about 2 seconds for it to decompress that nipple. I then turn the switch back to full heat, and as you'll see, it takes about 2-3 seconds for it to start engaging, even though the motor is working. When it starts going, it only goes about halfway of what it's supposed to go to fully close the blend door. I then stick my hand down, push down the lever so it's fully closed. Then I turn the switch back to full cold, and you'll see that it pops up again like it did in the beginning.

      Any ideas what this might be? Broken door, bad actuator, bad heater valve, etc.? Any insight is much appreciated.

      https://www.youtube.com/watch?v=4ANLJXg5UCQ
       
    4. Hoju1313

      Hoju1313 New Member

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      City, State:
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      Year, Model & Trim Level:
      2005 Mercury Mountaineer
      No air from defroster

      I seem to have the opposite problem from everyone else I have seen so far. I only get air from the vents on the dash and get nothing from the defrosters. From what I have read, if there is an issue with the vacuum hoses it defaults to defrost, so is my problem the actuator door behind the glove box? My wife is on me about this every day. Thanks.
       
    5. IIGood

      IIGood Active Member

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      City, State:
      Arnold, MD
      Year, Model & Trim Level:
      03 Explorer; 03 Mustang
      Thread from the dead...

      I've recently developed this issue as well. In watching the operation of the actuator arm, it seems it only has two positions: fully extended and fully retracted. Yet there would seem to be five positions for the vents, at least by my count: defrost only, defrost/floor, floor only, vents/floor, vents only. Correct? How does it divert to the floor vents if the arm doesn't move to a different position for that?

      Anyway...I digress...I had just spent 20 minutes "studying" this from under the dash and trying to come up with a fix. It doesn't look like much of the vent arm breaks off but I do see how it would get over-extended from the actuator arm when it fully extends. I dunno...I guess I was just trying to recreate how it's actually supposed to look and "reverse engineer." Me and my overthinking mind...LOL.

      I think I'm gonna try the zip-tie fix in post #19 here. It seems effective.
       
    6. IIGood

      IIGood Active Member

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      I took a stab at this last night and was unsuccessful initially. I was going to pattern mine after the method in post 19 in this thread...I got the zip tie through the metal actuator arm, and then tried wrapping it around the vent door's plastic arm. It wouldn't quite stay in place and that alone was rather tricky to get. I'm not sure how I would tackle wrapping the second zip tie around it to keep it in place. I may try it again tonight or I might try the double-side tape/electrical tape method in post 18.
       
    7. J Michael

      J Michael New Member

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      City, State:
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      Year, Model & Trim Level:
      2005 Explorer XLT
      Have the same problem. The end of the door arm broke off . Drilled a hole through the stub of the arm and threaded a zip tie through. For best results, thread the zip tie through the plastic arm first and push it almost all the way through.
      Then, use a needle nose pliers and pull the threaded end back and push through the hole in the vacuum link.
      Only tighten the zip tie part way. Then, switch the vent control back and forth between vent and defrost to see how long the zip tie needs to be.
      Once you know the length, tighten the zip tie to this length.
      Works great and passed the spouse test.
      IMG_1932.jpg
       
    8. Broke(n)

      Broke(n) New Member

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      City, State:
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      Year, Model & Trim Level:
      2004 4DR XLS 4X2
      Interesting. Wa
      This just happened to me today. Glad I found this thread. Already had a solution, but wanted to see what everyone came up with. I think I like the 'drill small hole and thin wire' approach.
      Does anyone know if removing the radio gives more access to all this?
       
    9. Stephen M

      Stephen M New Member

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      Does anyone have the part number or name of the plastic black arm? Mine is broken as well and I may try to pull the radio and replace it.
       

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