Vacuum hose for HVAC on some cars. | Ford Escort Owners Association (FEOA)
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Vacuum hose for HVAC on some cars.

Discussion in 'HVAC' started by zzyzzx, May 23, 2018.

  1. zzyzzx

    zzyzzx FEOA Member

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    As Per the rules:
    Please provide questions in the following format:
    1) Y/M/E, (year/model/engine) 1995 LX Sport 1.9L
    2) detailed description of the problem - Broken vacuum hose for HVAC
    3) what you have tried so far. - Nothing except capping off the line so I don't have a vacuum leak.

    This is for that vacuum line that goes through the firewall (really connects to an adapter at the firewall, on both sides, but...
    I've noticed for cars with vacuum operated HVAC door (for air r- circulation on 1994-ish and newer Escorts) use a thin hard plastic vacuum line instead of a regular vacuum line, with adapters at both ends. Mine has broken, so no recirculated air for me for now! But is there any reason why I can't just use a regular vacuum hose? I figure that or find a way to shorten my existing hose a little, since it is broken at the end.
  2. marclar

    marclar Moderator Staff Member

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    the only reason they use rigid hose is so it doesn't collapse. you can use 'vac' hose if you need to.
  3. zzyzzx

    zzyzzx FEOA Member

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    I was thinking that when they use hard vacuum hose like that, it had something to do with what was flowing through it might be harmful to the hose (not in this case) or maybe something heat related (getting too close to something hot; also not applicable here).
  4. marclar

    marclar Moderator Staff Member

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    its more for longevity. a rubber hose WILL deteriorate faster than a solid hose. but the solid ones are prone to cracking... but youll be fine just running a rubber vac hose.
  5. zzyzzx

    zzyzzx FEOA Member

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    Already replaced with a regular vacuum hose and seems to be working just fine.

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