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Thread: new EATC

  1. #1
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    new EATC

    Hi All,

    I ordered a reman. EATC unit cause I cannot switch to vent, floor, defrost, etc.

    It looks like 1 vacuum line is missing. is it supposed to be like this?

    already did blend door. And EACT test. no codes are showing.

    Thanks, Anthony
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    Last edited by tbore007; 03-11-2019 at 07:22 AM.
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  2. #2
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    Eatc default mode is defrost when the o rings are bad.
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    Thanks to Marty O for his help in updating this car.

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  3. #3
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    I think one vacuum port in the bad is supposed to be open/no hose

  4. #4
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    I believe that port is to let air back in when returning actuators to normal position.
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    Quote Originally Posted by tbore007 View Post
    Hi All,

    I ordered a reman. EATC unit cause I cannot switch to vent, floor, defrost, etc.

    It looks like 1 vacuum line is missing. is it supposed to be like this?

    already did blend door. And EACT test. no codes are showing.

    Thanks, Anthony
    Picture of a spare I have.
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  6. #6
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    great. thanks for all the reply's. Looks like its supposed to be open.

    Now back to the drawing board on this issue. I am at a lose on what to check next.
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  7. #7
    Join Date
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    Replace o rings
    2004 SB Ported Trilogy 48
    Has supporting mods and stuff
    Thanks to Marty O for his help in updating this car.

    R.I.P.
    Rex "SC Cheesehead"

  8. #8
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    Quote Originally Posted by RubberCtyRauder View Post
    Replace o rings
    I bought a re-manufactured unit on ebay. Rings should be good right?
    Last edited by tbore007; 03-11-2019 at 12:30 PM.
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  9. #9
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    https://www.mercurymarauder.net/foru...ad.php?t=80673
    This might help you. O-rings are 7mm silicone IIRC.

  10. #10
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    There is supposed to be a "missing" hose.

    If you don't get any air to the floor, defrost or vents most likely the o-rings are bad.

    The EATC self-test will not return any codes if the o-rings are no good.

    If your "remaned" unit had the o-rings replaced can only be verified by taking apart the unit.

    If your o-rings are bad I can replace them and upgrade the button and fan wheel lights to LED.

    PM me for particulars.

    I'm actually working on a members EATC and compass right now.
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  11. #11
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    Where does the air actually come out?

    If it's vents only, it's not an O-ring problem. I O-ring'd my EATC in the past to solve the "stuck on defrost" only issue, but a couple months ago it got stuck on vent. The door in the HVAC behind the dash which switch between all the vents most likely broke. I wouldn't say it's a common problem but it's a common enough problem that I've seen it talked about on CVN. I'm going to have to pull the dash on mine this spring to take a look.


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  12. #12
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    Quote Originally Posted by offroadkarter View Post
    Where does the air actually come out?

    If it's vents only, it's not an O-ring problem. I O-ring'd my EATC in the past to solve the "stuck on defrost" only issue, but a couple months ago it got stuck on vent. The door in the HVAC behind the dash which switch between all the vents most likely broke. I wouldn't say it's a common problem but it's a common enough problem that I've seen it talked about on CVN. I'm going to have to pull the dash on mine this spring to take a look.
    Never heard of that issue with a Marauder.
    “When you can’t make them see the light, make them feel the heat.”
    Ronald Regan

    "The only way to deal with the Islamic State - these blood thirsty, blood-drunken, terrorists -
    is to kill them, keep on killing them, until you kill the last one, then you kill his pet goat."

    Lt. Colonel Ralph Peters

    “Be polite, be professional, but have a plan to kill everybody you meet.”
    "I come in peace. I didn't bring artillery. But I'm pleading with you, with tears in my eyes, if you **** with me, I'll kill you all"
    General James Mattis




  13. #13
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    Quote Originally Posted by fastblackmerc View Post
    Never heard of that issue with a Marauder.

    Broken blend door pivot is common on older (1999) gen F150's

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  14. #14
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    Lightbulb

    Quote Originally Posted by tbore007 View Post
    Hi All,

    I ordered a reman. EATC unit cause I cannot switch to vent, floor, defrost, etc.

    It looks like 1 vacuum line is missing. is it supposed to be like this?

    already did blend door. And EACT test. no codes are showing.

    Thanks, Anthony
    Sounds like my recent experience when ordering a ‘new’ battery for a used r/c car I had recently purchased. ‘Reman Batteries’ were being offered(!?!?) but I specifically requested a ’new battery’ for obvious reasons as they are still being manufactured. Sure enough, I received a ‘used battery’ that was way past its prime - it was returned to the vendor (on eBay) and a refund was issued through PayPal.

    Ordered another ‘new battery’ from a vendor on Amazon; scheduled to arrive this week as I bought the car for my grand daughters. Hoping this one is legit as I paid somewhat more for it.
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  15. #15
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    Quote Originally Posted by MyBlackBeasts View Post
    Broken blend door pivot is common on older (1999) gen F150's
    Same on Ford Rangers too.
    “When you can’t make them see the light, make them feel the heat.”
    Ronald Regan

    "The only way to deal with the Islamic State - these blood thirsty, blood-drunken, terrorists -
    is to kill them, keep on killing them, until you kill the last one, then you kill his pet goat."

    Lt. Colonel Ralph Peters

    “Be polite, be professional, but have a plan to kill everybody you meet.”
    "I come in peace. I didn't bring artillery. But I'm pleading with you, with tears in my eyes, if you **** with me, I'll kill you all"
    General James Mattis




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