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

Fan Only: Peculiarities of the Model 3

Discussion in 'Model 3' started by SageBrush, Aug 6, 2018.

  1. SageBrush

    SageBrush 2018: Drain the Sewer

    Joined:
    May 7, 2015
    Messages:
    6,399
    Location:
    Colorado
    I'd like to spell out a couple different uses of fan only and implementation details. I'll need help on most of it and will try to update this OP with a moderator's help when it is well flushed out.

    1. The easy one is fan only while driving. This just requires that Auto and AC be greyed out in the climate screen. The fan speed is the only control active.

    2. Cabin overheat protection:

    3. Car pre-conditioning using the mobile App:
     
  2. ewoodrick

    ewoodrick Active Member

    Joined:
    Apr 13, 2018
    Messages:
    1,101
    Location:
    Buford, GA
    Are you asking a question? Stating a fact? I'm not really sure what you are trying to say.
     
  3. SageBrush

    SageBrush 2018: Drain the Sewer

    Joined:
    May 7, 2015
    Messages:
    6,399
    Location:
    Colorado
    For (2) and (3) I would like to know how to use the fan only.
     
  4. SDKoala

    SDKoala RWD LR

    Joined:
    Apr 11, 2018
    Messages:
    525
    Location:
    San Diego
    Fan only is an option for cabin overheat protection that can be set. There's no option to turn on the fan only through the app; temp is the only thing you can set.
     
    • Informative x 1
  5. jsmay311

    jsmay311 Member

    Joined:
    Apr 22, 2016
    Messages:
    704
    Location:
    Chicago suburbs
    This doesn't prevent the heater turning on. So AFAIK, there is no way to actually do "Fan Only" in a Tesla. (Someone please correct if I'm wrong. Seriously, please let me be wrong... I hate this.)
     
    • Like x 3
    • Informative x 1
  6. ebmcs03

    ebmcs03 Active Member

    Joined:
    Dec 22, 2017
    Messages:
    1,493
    Location:
    So Cal
    That’s correct. It annoys the heck out of me that the heater turns on and I have to lower the temp setting to about 3-4 degrees below outside temperature to get just “fan” when I turn off the AC.


    Sometimes when it’s like low 70s outside I only need fan! But my climate temp is set to 74. So it turns on the heater.
     
    • Like x 1
  7. insaneoctane

    insaneoctane Active Member

    Joined:
    Apr 6, 2016
    Messages:
    2,302
    Location:
    Southern California
    I hate this too. Another example of Tesla making me unnecessarily fiddle with the center screen while driving. Having to adjust the climate temperature setting to match the outside temperature to avoid the heater from engaging. Oh and it's a constantly changing target. I just want the fan sometimes!
     
    • Like x 2
  8. KarenRei

    KarenRei KarenRei KarenRei KarenRei KarenRei KarenRei

    Joined:
    Jul 18, 2017
    Messages:
    2,888
    Location:
    Iceland
    Why do you feel the need to do this? If the temperature differential is only a few degrees, the impact on range should be minimal to negligible. I mean, maybe if you were going for a hypermiling run....
     
  9. insaneoctane

    insaneoctane Active Member

    Joined:
    Apr 6, 2016
    Messages:
    2,302
    Location:
    Southern California
    Because I usually don't want the air heated at all. The wasted energy is insult to injury.
    CONTEXT : I live in Southern California....
     
  10. KarenRei

    KarenRei KarenRei KarenRei KarenRei KarenRei KarenRei

    Joined:
    Jul 18, 2017
    Messages:
    2,888
    Location:
    Iceland
    If it's colder outside than the temperature you keep the car set to, then by definition, you've told the car that you want the air heated. So the question becomes, why are you lying to your car about what temperature you like it to be inside?
     
    • Funny x 1
  11. insaneoctane

    insaneoctane Active Member

    Joined:
    Apr 6, 2016
    Messages:
    2,302
    Location:
    Southern California
    If your post was in jest, please ignore....if not:
    It's 72 outside. I set my temperature to 72. Comfortable and no heat. A little while later the temperature outside drops to 69. Now the car is wasting energy with the heater (which I can usually feel). I have to fiddle with things. Rinse and repeat until about ~59 where I finally *might* want some heat. Except for about 1 or 2 months in the year I would simply never want heated air. Maybe heated seats, but not air...
     
  12. SageBrush

    SageBrush 2018: Drain the Sewer

    Joined:
    May 7, 2015
    Messages:
    6,399
    Location:
    Colorado
    I set my thermostat to 68-70F to avoid the fiddling.
     
    • Like x 1
  13. insaneoctane

    insaneoctane Active Member

    Joined:
    Apr 6, 2016
    Messages:
    2,302
    Location:
    Southern California
    I realize that in my scenario that I could initially set it down to 60, but if things go the other way and get hot enough to need AC that's even more fiddling. The take away is a simple button that says "fan only" that keeps the heater off. Isn't the cabin air heater one of the most power hungry accessories that we "control" (aside from the accelerator) ?
     
    • Like x 2
  14. Trevor B

    Trevor B Member

    Joined:
    Apr 2, 2016
    Messages:
    820
    Location:
    USA
    It is 56 in SFO ... how would that help? :rolleyes:
     
  15. jsmay311

    jsmay311 Member

    Joined:
    Apr 22, 2016
    Messages:
    704
    Location:
    Chicago suburbs
    Exactly. How does it make any sense to have a button to manually control A/C but not a button to manually control heat? Seems to me the dedicated A/C button is an anachronism dating back to when A/C compressors in cars were manually turned on/off via a single button and their control logic wasn't tied to a thermostat or cabin temp at all.

    IMO Tesla should just change the A/C button to a "Climate On/Off" or "Fan only" button. That provides the control that I and many others want and I don't see any downside. More fiddling with tiny touchscreen buttons and/or wasting energy when heat/cooling is not wanted is not the right answer.
     
  16. cella

    cella Member

    Joined:
    Aug 17, 2017
    Messages:
    115
    Location:
    San Jose, CA
    Are the climate settings stored in driver profiles? If yes, you could set up a "fan only" profile with temp set to 60 and A/C off, and then easily switch without fiddling with the temperature controls.

    I think part of the reason why almost all cars have an A/C button is that it sometimes makes sense to turn on the A/C to remove humidity even if you don't want to cool down the cabin.
     
  17. novox77

    novox77 1.21 Gigawatts

    Joined:
    Nov 25, 2017
    Messages:
    939
    Location:
    NH, MA
    Being judicious with HVAC usage actually pays big dividends for efficiency. Even when the temperature differential is small, like 3 degrees, the resistance heater uses a lot of energy. And in the 69F to 72F example, most people would agree they don't need the heat to feel comfortable. Fan only would be welcome.

    Another annoyance: if I need to defrost my windows, it turns on the A/C, which is fine (and the fastest way to defrost), but when I turn off defrost, I want my HVAC settings to go back to what they were. Instead, the A/C is left running. I'm submitting feedback on that one.
     

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