Volvo S80 1999 - Why do they cool the computer with air from climate control system?

Discussion in 'Volvo S80' started by Deacon Eisenhart, Jul 16, 2006.

  1. Upon finding the low side of my a/c system to test pressure, I noticed that
    the box next to the antifreeze and power-steering fill tanks (which contains
    two computers from the looks of it), is fed air from the climate control
    system to cool the computer modules.

    I wonder why they didn't just put the computers inside the passenger
    compartment like MOST other cars? Seems like a lot of abuse under the hood
    and complexity of now blowing cool air over them? I wonder if it blows hot
    air in the winter?

    I'm confused - has anybody ever thought about why they did it that way?
    Usually, they have their reasons?


    Deacon Eisenhart
    Deacon Eisenhart, Jul 16, 2006
  2. Deacon Eisenhart

    poopbunny Guest

    Possibly because the passenger compartment can be hotter for when the car is
    left out in the sun?
    poopbunny, Jul 16, 2006
  3. Deacon Eisenhart

    John Horner Guest

    Maybe to keep the wire lengths short between the computer and the
    various sensors and controls it integrates with?

    John Horner, Jul 19, 2006
  4. I thought that myself about passenger compart being hotter at times... Well,
    I guess I shouldn't lose sleep over it.

    I can't imagine wiring would be the issue, but that is a thought too.

    Deacon Eisenhart, Jul 23, 2006
  5. Deacon Eisenhart

    Tim.. Guest

    On the 850 the ECU box was cooled via forward motion of the car, or when the
    cooling fan was running through some pipes before and behind the radiator.

    On the 70 series Classic the arrangement is as the 80 series, the interior
    fan pulls air through the ECU box instead.

    I'm not sure why either!!

    Tim.., Jul 24, 2006
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