TMC is an independent, primarily volunteer organization that relies on ad revenue to cover its operating costs. Please consider whitelisting TMC on your ad blocker and becoming a Supporting Member. For more info: Support TMC
  1. TMC is currently READ ONLY.
    Click here for more info.

“Cold” soaked cabin temp - S vs 3?

Discussion in 'Model S' started by brkaus, Dec 10, 2018.

  1. brkaus

    brkaus Well-Known Member

    Joined:
    Jul 8, 2014
    Messages:
    7,626
    Location:
    Austin, TX
    i have an S and a 3 in my unheated garage. Cold is in quotes because I’m talking Texas cold. Not real cold. I’d say garage temp is low 40s

    Both cars unplugged at least 48hours.

    Both cars undriven overnight - at least 11 hours.

    The S cabin temp, reported by the app, was 58.

    The 3 cabin temp, also reported by the app, was 49.

    Why the significant difference? Both have been in roughly same climate and had similar driving the previous day.
     
  2. f205v

    f205v Member

    Joined:
    May 12, 2018
    Messages:
    641
    Location:
    Tessin, Switzerland
    Can you check the cabin temperatures with a thermometer (not the car one, I mean another thermometer) to see if there is a real difference in temp or if it's an error of the car_sensor/app.
     
  3. boaterva

    boaterva Supporting Member

    Joined:
    Apr 2, 2016
    Messages:
    7,562
    Location:
    Northern Virginia, USA
    Our 3 and X report about the same difference (10 F). I thought it was because one was on the ‘outside’ of the garage (lesser toward the heated house, corner, etc.).

    Now you’ve made me take my IR thermometer gun and test this in the AM before I prewarm the 3 for the GF. :D

    The X’s internal temp sensor (and I assume the S’s) is at the base of the front of the console. Not sure I recall where the 3’s is.
     
    • Like x 1
  4. SeminoleFSU

    SeminoleFSU Voluntaryist

    Joined:
    Apr 5, 2013
    Messages:
    1,448
    Location:
    Atlanta, GA
    Any windows in the garage? One car getting any sun?
     
  5. croman

    croman Active Member

    Joined:
    Nov 21, 2016
    Messages:
    4,624
    Location:
    Chicago, IL
    S temp is known to misreport. I guess they fixed it in the 3.
     
  6. JohnnyG

    JohnnyG Weee!

    Joined:
    Jun 24, 2016
    Messages:
    872
    Location:
    Columbus, OH
    I can't speak for the X or 3, however, the S has a fan that sucks cabin air into a chamber for accurate temperature measurement. If this fan isn't circulating (car climate control is off), it will not read an average temperature measurement of the cabin air. At this point, it is just reading the temperature of the stale air trapped (insulated) in the sensor chamber.

    This can be easily seen by leaving your car parked in the sun outside in the winter. Set your climate manually to have fan at 1, A/C off, recirc on, and temp at Lo, and then make sure to turn it off. After the car has sat out there for a couple hours, check the cabin temp. Now turn on the climate control. With your settings, it really isn't doing much, however the temp sensor fan will engage, and you'll see the cabin temp change drastically. This is due to it sucking in actual cabin air and measuring it's temp.
     

Share This Page

  • About Us

    Formed in 2006, Tesla Motors Club (TMC) was the first independent online Tesla community. Today it remains the largest and most dynamic community of Tesla enthusiasts. Learn more.
  • Do you value your experience at TMC? Consider becoming a Supporting Member of Tesla Motors Club. As a thank you for your contribution, you'll get nearly no ads in the Community and Groups sections. Additional perks are available depending on the level of contribution. Please visit the Account Upgrades page for more details.


    SUPPORT TMC