Seat warmer turns on automatically

Discussion in 'Clarity' started by Jordan, Nov 15, 2018.

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  1. Jordan

    Jordan Member

    With the sub freezing temps, my seat warmer turns on automatically now when I start the car. How on Earth do I stop that from happening? I couldn't find a setting for it anywhere?.
    ClarityDoc likes this.
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  3. jorgie393

    jorgie393 Well-Known Member

    This happens when you are in ECON mode, to save energy. If you take the car out of ECON mode, it should prevent this.

    Sent from my iPhone using Inside EVs
    insightman likes this.
  4. Jordan

    Jordan Member

    The seat warmer saves energy? I thought it was a heavy user of energy.
  5. ClarityDoc

    ClarityDoc Active Member

    More efficient than heating the cabin, I would guess.

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  6. Jordan

    Jordan Member

    Ah ok, well thanks for the help. I just don't like seat warmers so it's just kind of annoying to remember to turn it off.
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  8. jorgie393

    jorgie393 Well-Known Member

    If it really bugs you, [and you want to stay in ECON], fuse C32 is labeled “Front seat heater control unit (via front seat heater relay circuit)” and controls nothing else. One would suspect that pulling this fuse would disable the relay, and therefore the seat heaters.

    Sent from my iPhone using Inside EVs
    Last edited: Nov 15, 2018
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  9. KentuckyKen

    KentuckyKen Well-Known Member

    I could not find a setting for this either. The manual says it’s pegged to the climate control settings and if you don’t want it, then turn it off. No help there! It also says that in Econ it will auto turn itself down as well.

    Mine seems to always turn on the driver’s seat heater if it’s in Econ, but not if Econ is off at start up. And if I choose Econ after start up, it comes on too if the Climate Control temp is high enough.
    It seems pegged to Econ being on along with Climate Control being on with temperatures and settings that call for heat.
    So the only way I can find to not have it auto come on is to not be in Econ, or not have the CC on, or CC on with low temperature set. But that still requires it to be turned off or Econ and CC turned back on. So I still have to push buttons.
    So I can’t find a way to defeat the auto seat heater in Econ without button pushes.
    Anybody figure this out?
  10. John Gardner

    John Gardner New Member

    Anything that derives its energy from the 12 volt battery is minuscule compared to Climate Control. The seat heaters in the grand scheme of things draw very little power. I have not done or read about any current measurements for these devices but in the Fit EV we had a display for energy use when we turned on different items. Lights except for headlights showed one bar, turning on headlights were two bars. Wipers in intermittent were one bar but set to on then would use two bars. Adding devices together would still show two bars. Seat heaters were one bar.

    By using these 12 volt devices would impact range very little. This was observed over 5 years of driving the same route to work and home. Heater was the highest consumer of power (no heat pump in the Fit) and the air conditioner was high but no where near what the heater draws. Everything else adds up to reduce range in the colder months. The cold air makes the battery less efficient and does not hold as much of a charge but it does charge to full quicker. Regeneration kicks in at graduated levels depending on the temperature below 50 degrees. At least this was the way the Fit EV was programmed, I don't have enough experience yet with the Clarity Electric to know at what points regen kicks in. As you drive the battery will heat up and regen will return to normal.

    Long story short, in the colder months don't worry too much about the 12 volt accessories you use, it's the temperature outside and how much you use the heater. I spent three cold years using only the seat heater and a heavy parka in the winter to get to work and back. Then my company installed charging stations and I have driven warm during the winter since... :)

    ClarityDoc, V8Power and rickyrsx like this.
  11. jorgie393

    jorgie393 Well-Known Member

    P.S. The formal word from the Owner's Manual (p. 191):

    " Avoid using seat heaters when the 12-volt battery charge is low. The vehicle may be difficult to start.

    After a certain period of time, the strength setting for the seat heaters will automatically be reduced by one level at a time until the seat heaters shuts off. The elapsed time varies according to the interior environment.

    When the ECON mode is active, the driver’s side seat heater functions according to the status of the climate control system. If you want to use only the climate control system, press the seat heater button to OFF."
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  13. dnb

    dnb Active Member

    It should only start with 1 out of the 3 power levels. I personally crank it to 3 because hot seat feels great on my back :D
    Heino likes this.
  14. Heino

    Heino Active Member

    I actually love this feature, as a toasty butt feels amazing... so much so when I return from lunch to work, I do not want to get out of the car. :)
  15. jdonalds

    jdonalds Well-Known Member

    The seat warmers were a key factor in my wife wanting the Clarity.
    Last edited: Nov 15, 2018
  16. vicw

    vicw Active Member

    Seems there is rarely a day when I don't learn something new about the Clarity from this forum that I didn't know before, but I'm quite surprised to learn that the seat heaters will come on automatically. A couple of cold nights ago, I turned on my wife's heater to make her comfortable, and then noticed that mine was on, too. I thought I must have inadvertently hit that button, and accidentally turned it on, but apparently it was automatically started.

    I"m not too happy that this will happen again - repeatedly. I don't much care if Climate Control uses more battery, I want the cabin to be comfortable, and I really would prefer that the seat heater operation would be directly under my control.
  17. jorgie393

    jorgie393 Well-Known Member

    I agree would be better to have control, but If you don’t mind not being in ECON mode, I believe the “auto-on” only happens in ECON.

    Sent from my iPhone using Inside EVs
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  18. vicw

    vicw Active Member

    Agreed, but my problem is remembering to make the SWITCHOVER each time. I'm old, and forgetful.

    I also don't know what else is affected by switching Econ OFF.
  19. insightman

    insightman Well-Known Member Subscriber

    The Climate Control system will heat the car more quickly in NORMAL or SPORT Mode than in ECON Mode--that's one of the economies ECON Mode implements.
  20. vicw

    vicw Active Member

    Thanks, insightman. I'm for that. By Normal Mode, I assume that equates to ECON Mode turned OFF.

    You say it is one of the economies of ECON Mode. I wonder what, if anything else, it affects.
  21. dnb

    dnb Active Member

    Well apparently the seat heater is also more economical which is why thats the default when in econ mode.

    Page 388 from the manual:
  22. insightman

    insightman Well-Known Member Subscriber

    Yes, NORMAL Mode is the non-selection of either ECON or SPORT Modes.

    Other than the activation of the seat heater and the mapping of the accelerator pedal, this is what the Owners Manual says on page 195 (note that it doesn't mention anything about HEATING performance):
    While ECON mode is active, the climate control
    system may have reduced cooling performance.
  23. vicw

    vicw Active Member

    Thanks dnb & insightman and for your clarifications regarding Econ Mode OFF effects.

    I don't know if Honda intentionally made that selection as vague as possible, but if they did, they were successful, at least for me.

    Pressing the Econ button to turn Econ Off, with the only visible immediate change being the loss of the leaf icon on the screen, and/or the driver seat heater turning on, (if it's really cold outside) is pretty obscure, and the manual comment regarding cooling performance is equally vague, I think.

    Bottom line to me is that it doesn't seem likely that there are any other effects of turning Econ OFF than the seat heater vs Climate Control, Cooling performance and the Accelerator behavior.

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