Finally joined the Imperial club ...ATC help needed

Imperial

  1. Fury Pursuit

    Fury Pursuit Senior Member

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    I finally was fortunate and lucky enough to join the Imperial owners club recently.

    The car has ATC which is somewhat complicated and problematic in nature....

    Is there a “ATC” guru that can give me some guidance on the basic mechanics/theory as to how the system functions or operates properly?

    The controls work, I.E. the fan activates, but I believe I need a new “heater by pass valve”...is it normal to have the A/C compresor “engaged” at all times ?

    Thanks for reading and any suggestions.
     
  2. ImpJay

    ImpJay The different young FCBO Gold Member

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    Nope, it should only be on AUTO settings and DEF.

    From which model year is your Imp?

    The (nut shell) basics of Auto Temp is that there is two censors in the car, of which the other one is measuring the ambient temperature and the other does measure the temperature inside the car. The censors and potentiometer send information to an amplifier, which does control the system to maintain a selected temperature. The power servo replaces the blower speed switch of a ``normal`` A/C system.

    As to why your compressor is engaged all the time, I hope that some of the wiser guys would chime in.
     
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  3. Fury Pursuit

    Fury Pursuit Senior Member

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    Whoops! I forgot to mention the Imperial is a 1969.
     
    Last edited: May 17, 2019
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  4. hergfest

    hergfest Active Member

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    Pray to whatever god you believe in?
     
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  5. detmatt

    detmatt Old Man with a Hat FCBO Gold Member

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    @Clover would be who I went to first with this but he doesn’t come around much lately. I’ll send him a text a little later and see if I can get him to chime in.
     
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  6. Ripinator

    Ripinator Senior Member

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    This thread has a lot of good info regarding ATC II:

    What I learned about 74-78 ATC II
     
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  7. 68 4spd Fury

    68 4spd Fury Well-Known Member

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    I'm by know means an expert, and the memory may not be accurate, but I had a 71 T&C w/ATC many years ago and as I recall the compressor did run all or most of the time when the system was on.
     
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  8. Fury Pursuit

    Fury Pursuit Senior Member

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    Thanks for the explanation. Is there any type of "normal maintenance" aside from using the system to keep it in working order?

    Any advise or comments are appreciated.

    I'm praying to WPC currently!
     
  9. commando1

    commando1 Mr. Normal FCBO Gold Member

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    First of all, the Gurus will need to know..
    1. Does heat shut off and come on and will the control level adjust the amount of heat.
    2. Does the A/C work and will the control level adjust the amount of coolness. .
    3. Does the flow of tempered air adjust between Heat and Defrost.


    Anybody who starts throwing diagnosis' without know exactly what it is currently doing and not doing is just blowing hot air.

    Let's see if this ends up over in the Gold Member thread... :popcorn:
     
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  10. ImpJay

    ImpJay The different young FCBO Gold Member

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    For that you must wait for someone currently having the AT in his (or on a few occasions her) car.
     
  11. saforwardlook

    saforwardlook Old Man with a Hat FCBO Gold Member

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    71's were ATC II cars.
     
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  12. saforwardlook

    saforwardlook Old Man with a Hat FCBO Gold Member

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    If you need one of those vacuum controlled heater valves for your first generation ATC system, Trev, I have one you can just have. I have more than one, and I doubt I will use any of them.
     
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