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Air recirculate automatic selection

Discussion in 'Gen 2 Prius Main Forum' started by Peter Ball, Mar 5, 2010.

  1. Peter Ball

    Peter Ball Junior Member

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    Most people complain about this automatically turning off or its behaviour in combination with the A/C or defog function. However it really bugs me that it turns on by itself when I am not using the A/C.

    It seems to happen when the inside of the car is warm but not quite warm enough for me to want to turn on the A/C. In this case blowing in some outside air would be sufficient and I'd be happy. However because I forget or have more important things to do (like driving) I don't check the setting and when the stuffy air starts to bug me, I then check it and find that it has gone to recirculate by itself. Like recirculating warm stuffy air is going to help, dooh!

    Can this automatic selection be disabled?
     
  2. richard schumacher

    richard schumacher shortbus driver

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    I haven't tried this, but maybe: go to the climate screen, select OFF, then select a fan setting, then select outside air ? Having done that it should stay that way until you change it OR select Auto.
     
  3. Peter Ball

    Peter Ball Junior Member

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    Hi thanks for the tip. Unfortunately it does not help. It tried switching it off and then selected a fan setting and drove for a while with it on fresh air. It was a warm day so it was getting a bit hot by the time I arrived so I thought it would be a good test, so I switched the car off and then back on and sure enough, the recirculate mode came on by itself again! Normally I would have driven off without checking the mode and it would have been blowing the same warm around in circles.
     
  4. uart

    uart Senior Member

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    I've got exactly the same gripe Peter. I also like to just use fresh air instead of A/C when the weather is mild or warm, but almost every time I restart the car it set's it back to recirculate. I also find it really annoying, especially after I set it to fresh at the start of the trip then stop for three minutes (for fuel or food etc) and resume driving ... after ten minutes I notice how uncomfortable and stuffy it is and then it's like oh yeah I forgot that I've got to push that recir/fresh button EVERY time I start the car.

    While it often does this sometimes it doesn't do it and I'm not really sure why/whynot. Maybe it's got something to do with the external temperature. I'm guessing that if the external temperature is over some threshold then it just assumes that you should have A/C on and so sets it the recirc.

    BTW. I find the little recirculate icon on the dash useful, you have to look for it every time you start, and the little half circle button on the upper right side of the steering wheel to toggle recirc/fresh is a lot easier than using the multifunction display.
     
  5. Peter Ball

    Peter Ball Junior Member

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    That was my thought as well. Maybe the programmer had a few too many sakes on a Friday afternoon or something.

    The problem with checking the recirculate icon when you start is that it sometimes comes on by itself AFTER starting. So best click it on and then off using the steering wheel every time you start the car. Unfortunately it's one of those things that are easily forgotten.
     
  6. uart

    uart Senior Member

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    Yeah I've had that happen too, it's like it's almost like it's always trying to catch you out. Sometimes I think little things like this are just so annoying because you've got a mindless piece of electronics constantly trying to override your settings and your preferences, and getting it wrong every time of course! What ever happened to Asimov's second law of (science fiction) robotics, grrrrrr. [ame=http://en.wikipedia.org/wiki/Three_Laws_of_Robotics]Three Laws of Robotics - Wikipedia, the free encyclopedia[/ame] :p

    Anyway I might try a test this week. I'm thinking about setting my "auto A/C" set point to something ridiculously high (like 30C or something but with A/C off of course), so that the outside temperature is lower than the set point, and see if that causes it to leave the air setting on "fresh" where I set it.
     
  7. uart

    uart Senior Member

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    Hang on I think I just remembered that I tried the above before (I complained here about the same problem here a few months ago Peter). If memory serves me correctly I think the dammed thing just kept heating up the air (even though auto A/C was off) when I used the high set point (like 30c for example). In other words, what I seem to remember is that when I set a high temperature there was no way to stop it trying to achieve that. Unlike with a low temperature setting, where you can just turn A/C off and at least it won't override you on that, from what I remember I just couldn't find any way to turn it off when a high temperature (which required warming rather than cooling) was selected. I'll have to double check this again though, since my recollection of this is a bit hazy atm.
     
  8. Peter Ball

    Peter Ball Junior Member

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    Maybe it thinks that through inaction, I might come to harm...

    As a programmer, I find it is particularly annoying when other programmers make invalid and stupid assumptions, which result in the otherwise avoidable situation of the system doing stupid things. However maybe everyone finds this just as annoying as I do.

    Does anyone know how to deactivate this? I mean, a way short of removing the wires on the servomotor?