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HVAC display

Discussion in 'Gen 3 Prius Main Forum' started by Kermit80526, Jun 21, 2024.

  1. Kermit80526

    Kermit80526 Junior Member

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    I've searched the history and have not been able to find anything on this, but here is my issue. My HVAC display, on my 2011, is excruciatingly difficult to read if not impossible in average midday sunlight. From what I can tell there is a backlight in there that is on all the time.

    The odd thing is that for the main display, there is a daylight and nighttime mode, which does not seem to be the case with the HVAC display there is only one level of light intensity regardless of whether the lights are on or off.

    There might be a slight film on the inside of the lens, much like you might get on your windshield over time, but I don't think that's exclusively or even mostly my problem. Does anybody have any insight or similar experience with this?
     
    #1 Kermit80526, Jun 21, 2024
    Last edited: Jun 21, 2024
  2. bisco

    bisco cookie crumbler

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    this is the gen 3 forum, what year are you talking about?
     
  3. rjparker

    rjparker Tu Humilde Sirviente

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    He shows a 07 Prius by his name.

    The gen2 mfd screen has a brightness and contrast control.

    Page 238 of the owners manual has more details IMG_5461.jpeg
     
    #3 rjparker, Jun 21, 2024
    Last edited: Jun 21, 2024
  4. ChapmanF

    ChapmanF Senior Member

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    Or maybe it's a gen 3 and in the right forum ... the gen 3 HVAC display is a narrow LCD strip with a green backlight.

    I'm not sure I thought the backlight was on all the time, but I can check mine later. I also don't remember it as just one fixed brightness; at night it might respond to the dash dimmer like a lot of the rest of the dash does.
     
  5. Kermit80526

    Kermit80526 Junior Member

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    2011. Should be similar or same for all Gen 3 though.
     
  6. bisco

    bisco cookie crumbler

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    yes, i just saw the 07 in your info.
     
  7. Kermit80526

    Kermit80526 Junior Member

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    Thank you for the detailed response, but it is a gen 3.
     
  8. Kermit80526

    Kermit80526 Junior Member

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    That would be greatly appreciated.
     
  9. Mendel Leisk

    Mendel Leisk Senior Member

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    I better not get started, about Prius HVAC controls... :rolleyes:
     
  10. ChapmanF

    ChapmanF Senior Member

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    The later ones have neural networks, they might start replying to you.
     
  11. Mendel Leisk

    Mendel Leisk Senior Member

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    I might hurt their feelings.

    Seriously, the wife just about loses it, every time I so much as glance at the H/V controls while driving. A poorly lit display, required cus the "controls" are a uniform row of indistiguishable buttons, with vent mode in particular requiring concentrated off-the-road attention, squinting at a dim/dusty/tiny parade of icons.

    Ah geez, getting started.

    Attached is an example of what I'd kill for, was the system on lower end Honda Fits, till Honda axed it for North America. In higher levels it "upgraded" to a touch-screen disaster.
     

    Attached Files:

    #11 Mendel Leisk, Jun 22, 2024
    Last edited: Jun 22, 2024
  12. bisco

    bisco cookie crumbler

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    gm has all the hvac controls on the center touch screen, then duplicates them with manual switches below. not sure why the extra expense of the touch screen, but maybe it costs almost nothing to add them there, since you need it for nav/phone/settings/etc.
     
  13. rjparker

    rjparker Tu Humilde Sirviente

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    All gen3s are not the same. My model is quite easy to adjust temp and fan speed using the big multifunction dial.

    IMG_5475.jpeg
     
    Mendel Leisk likes this.
  14. bisco

    bisco cookie crumbler

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    that is nice, i wonder why the lift back never got it.
     
  15. Kermit80526

    Kermit80526 Junior Member

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    Point taken. I forgot about Prius Vs.
     
  16. ChapmanF

    ChapmanF Senior Member

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    How does it know whether you're adjusting temp or fan speed?
     
  17. rjparker

    rjparker Tu Humilde Sirviente

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    You get temp by default. Slide it right and you get fan. Slide it left and you have air modes.

    Push for AutoManual. However once you change the fan it goes to Manual which I prefer.

    You can also change temp and Recirc on the steering wheel but that is not quite as tactile.

    IMG_5479.jpeg
     
    #17 rjparker, Jun 23, 2024 at 11:25 AM
    Last edited: Jun 23, 2024 at 12:13 PM
  18. ChapmanF

    ChapmanF Senior Member

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    Nice! I wonder if a little 3D printing could retrofit that controller into a liftback.
     
  19. AzWxGuy

    AzWxGuy Weather Guy

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    I had a 2011 Prius 3 with the dim green HVAC control panel and I can't remember if it responded to the dashboard illumination control either. I looked at the display now and then, but mostly used the steering wheel control to make adjustments

    Here is a grab from my user manual:

    upload_2024-6-23_8-43-5.jpeg

    I think somebody did a mod and replaced the green LEDs with blue, improving the contrast greatly. Search is your friend.
     
  20. AzWxGuy

    AzWxGuy Weather Guy

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    I remember it being some sort of "fuzzy logic". What I thought was cool were the positive temperature coefficient (PTC) heaters that could provide a little heat right away on those very frigid mornings.