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How to: 2nd Gen NO AC ( or heat) FROM VENTS!!! A "How to" what to look for thread

Discussion in 'A/C & Heater systems - HVAC' started by Turdle, August 9, 2007.

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    1. evertsen1010

      evertsen1010 New Member

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      payment sent

      I joined and sent you the $15 for shipping. Thanks in advance! How long to ship you think?
       
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    3. Turdle

      Turdle I bake stuff Staff Member Moderator Elite Explorer

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      Which do you prefer
      DHL or mail-
      I think DHL will get to you quicker. It will go out in the morning.

      For DHL it is good to have your phone number-send it to me in a private message--
       
    4. evertsen1010

      evertsen1010 New Member

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      what's your e-mail address
       
    5. Fish Man

      Fish Man Elite Explorer

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      so mine just started doing this today. with it being 99 degrees out, it sucks. is there any easy to diagnose which is leaking? I just put on my 33's so i suppose a tire could have hit my schwetty ball thing? (yes, i know that was a joke ;) ) ah im not particularly looking forward to tearing the truck back apart, with it being so hot out and me not having a cool place to work on it. so the idea is to just find all those connections you listed and make sure they're all good still? thanks for your help everyone!!
       
    6. Fish Man

      Fish Man Elite Explorer

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      then again if my schwetty ball had been impacted wouldnt i more than likely only have defrosting a/c at idle??
       
    7. Fish Man

      Fish Man Elite Explorer

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      help with my schwetty balls!! its hot down here in GA!!
       
    8. Turdle

      Turdle I bake stuff Staff Member Moderator Elite Explorer

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    9. hector1

      hector1 New Member

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      No air con from vents

      :cool: thanks for the info, finally found the problem. Both vacum hoses engine side of firewall under aircon unit were worn through. {grey and black hoses}. Thanks Hector Bisbane Queensland Australia.
       
    10. hector1

      hector1 New Member

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      No air con from vents

      :cool: thanks for the info, finally found the problem. Both vacum hoses engine side of firewall under aircon unit were worn through. {grey and black hoses}. Thanks Hector Bisbane Queensland Australia.
       
    11. ProjectAviator

      ProjectAviator Elite Explorer

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      Jon, thanks for the write up as I have been trying to figure out why I was having climate control issues.
      For those who have 95-96 EXs the vacuum globe provides vacuum for the front axle disconnects. So if you swap front axles or do a SAS you may have this problem ( like I did)

      Tim
       
    12. Lokvear

      Lokvear New Member

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      I have this exact problem I havent looked yet at any lines my question is I just had my muffler on back replaced a day before I noticed this problem of A/C & heat from defrost only. Can the 2 be related? or was it just a coincidence?
      Thanks
       
    13. Lokvear

      Lokvear New Member

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      Ps great write up will make looking for problem much easier
      Thanks !!
       
    14. MotownGT

      MotownGT New Member

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      Need help with vacuum line routing

      Vehicle: '97 Ex Sport, 4.0 SOHC, 4WD.

      I removed the fender liner to get to the vacuum reservoir. The one line from the reservoir is connected to the connector on the firewall near the blower motor.

      The other line was just hanging in space, not connected to anything. What is this line supposed to be connected to?

      I searched and searched but I could not find any place on the intake manifold or otherwise where this could be connected.

      Can anyone help? Does anyone have a picture?

      Thanks.:)
       
    15. CDW6212R

      CDW6212R Hauls the mail. Elite Explorer

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      Find the heater control valve, it should go there. That is located under the alternator of the SOHC, follow the heater hoses.
       
    16. MotownGT

      MotownGT New Member

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    17. jt1186

      jt1186 New Member

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      Hey guys, first of all let me thank you for the site; it has saved me a lot of time and money w/ my explorer. Now, I have a 1998 explorer 4.0L SOHC with the climate control feature thing. My a/c will blow from the vents and all the other settings, but it isn't very strong. It gets nice and cold but it just doesnt blow very hard. I just cleaned the evaporator coil and that helped a bit, but i was wondering if maybe one of the vacuum controlled actuators isn't opening all the way possibly from a vacuum leak like yall discussed in this thread? Would that be a possible cause or are there any better ideas?
      Thanks!!
       
    18. MotownGT

      MotownGT New Member

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      I finally got a chance to go take a look. There is a red vacuum line plugged into the vacuum port on the heater control valve.

      1) Am I possibly looking at the wrong part?

      2) Where should that red line go?

      Thanks again.
       
    19. CDW6212R

      CDW6212R Hauls the mail. Elite Explorer

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      The lines for the vacuum canister and heater control valve are typically gray or black. The colored lines(red/green) usually are for the fuel pressure regulator or EGR valve. This is just a general guideline of what I recall on my cars. Ford keeps changing things, so what is correct for one year will be wrong for other years.
       
    20. MotownGT

      MotownGT New Member

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      I was looking at the wrong thing. I have come to the conclusion that I can't find the heater control valve because it isn't there. My guess is that at some point, the valve failed, and instead of replacing it, the owner just removed it, and just ran new heater hoses directly from the heater core to the hard lines directly.

      I looked at rockauto.com, and there appears to be two different designs for the HCV-a 2-port and a 4-port. Which do I want? (I'm guessing the 4-port, as that is what I've seen most often in the past).

      If the 4-port is what I need, should I just tie it in between the heater core inlet/outlet and the hardlines?

      Sorry for all the newb questions, but I'm still pretty new to Explorers.
       
    21. CDW6212R

      CDW6212R Hauls the mail. Elite Explorer

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      I'd suggest the new hoses and HCV yes. Try to get them at a local store, but if you can't get a certain answer about the exact parts needed, go to Ford. I'd avoid a mail order source for anything which you don't have the right parts for now. You need to know what is needed, and if it's missing on your truck, then you can't be sure until after you get the parts.

      I'm not sure how the 97 may differ from 99, but mine I bought as all new parts from Ford. The path of the water is simple, the heater control valve has one inlet and one outlet, and a mounting bracket that holds it to the engine under the alternator.
       

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    22. celly

      celly disturber of the peace Elite Explorer

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      Subscribed.
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      Last edited: July 7, 2009
    23. RJ soss

      RJ soss New Member

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      hey what size are these vacuum lines.? I have vacuum all the way to the T next to the defrost actuator. So Im thinking just changing out those lines and T.

      :rangerred:
       
    24. celly

      celly disturber of the peace Elite Explorer

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      That reminds me that I've got to try and troubleshoot my vacuum leak this weekend. It's been hot and I want my normal AC back again. I found no visible issues first time I had a look. I lost my vents right after we installed my headers. This could be a "fun" one to figure out. :(
       
      Last edited: July 28, 2009
    25. jimbo2k

      jimbo2k New Member

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      Thanks you guys

      Been living with defrost only for a month. Thought the Idle was just a little rough. Found the line from the ball diconnected. Redid it and all is well . Thanks again. Jim
       
    26. celly

      celly disturber of the peace Elite Explorer

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      I wish mine was that simple. The lines to/from the vacuum ball seem fine. I've disconnected/reconnected a few times and still nothing but defrost. :(
       

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