GetOffYourGas
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Re: The Best, Least-Known Tips & Tricks

Mon Jan 30, 2017 11:32 am

LeftieBiker wrote:* Partial Recirculate Mode. The 2013 and later Leafs have a barely-documented feature that is actually very helpful in Winter, especially when combined with the next Trick after this. With the ventilation set to one of the modes that allows Recirculation (any of the non-defrost modes), and with Recirculate mode on, press and hold the Recirculate button until the light above it starts to flash, then quickly release it. The light will flash twice, then go out, making it look like the car is in Fresh Air mode. In fact, if done correctly (and it may take a little practice, to avoid re-engaging full Recirculate) the ventilation system is now taking in roughly 1/3 fresh air, and recirculating the other 2/3. This mode does two things: it reduces the amount of external smog getting sucked into the car, and it increases the efficiency of the heater in cold weather, because most of the air doesn't have to be heated from outside ambient.


As far as I can tell, this works in my 2012 Leaf as well. It is not restricted to 2013 and later models.
~Brian

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gregn
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Re: The Best, Least-Known Tips & Tricks

Mon Jan 30, 2017 1:03 pm

In the 2016 Manual form SV That feature is called Auto Recirulation. Page 4-28
The mention the procedure of holding the button till it flashes. They say it will now run in auto mode adjusting the flapper based on need. It can go to full Re-Circ at times.
I do use this mode and it does lower the energy consumption of the heater especially when it's 0º F or below.
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LeftieBiker
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Re: The Best, Least-Known Tips & Tricks

Mon Jan 30, 2017 1:33 pm

I think someone had said it didn't work in their 1st gen Leaf. I'll fix the FAQ.
2013 "Brilliant Silver" SV with Premium Package and no QC, and 2009 Vectrix VX-1 with 18 Leaf cells.

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IssacZachary
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Re: The Best, Least-Known Tips & Tricks

Mon Jan 30, 2017 1:34 pm

I was testing out the Auto function to get recycle along with defrost.

It was 6°F when I left. The car was preheated. It is also very sunny. When I changed the climate control "thermostat" up or down it would go to floor only mode at higher temps and then bi-level mode at lower temps.

Then the outside temperature changed to 5°F and I noticed the change. By pushing Auto it would choose floor only mode at higher temps and defrost/floor mode at lower temps. And just as before, if I hit recirculation it will recirculate in defrost/floor mode.

I'm not sure what the inside temperature is but I had preheated it to 70°F an hour before leaving home and drove 5 miles across town before noticing this change.
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LeftieBiker
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Re: The Best, Least-Known Tips & Tricks

Mon Jan 30, 2017 1:41 pm

arnis wrote:Leaf that have HEAT button on CC panel:
AUTO engages partial recirculation if heat is needed.
No need to hold recirculation button, it just defaults back
recirculation mode into AUTO (aka third-recirculation if heating engaged).

AUTO almost always keeps airflow setting at defrost+feet in cold (sub-freezing) weather.
Only if there is a lot of sunshine and cabin is fully warmed up, it might switch to feet.

PS! Selecting FEET actually keeps defrost vents active with limited airflow.
To save energy (and it's not very damp) you can manually select FEET, glass will not fog up.
To have more air to the feet or defrost while in defrost+feet or feet mode, close left and right face-went.
To save even more manually stuff up rear passenger foot ventilation.

Selecting face+feet will totally block airflow to windscreen, same with face only.

Also full recirculation is possible with defrost only on newer CC panels with HEAT button.
Just select defrost with MODE button and push recirculation. Useless mode, it fogs up.


TIP: if you want to keep Leaf running with heater working and also want to save juice, push
recirculation button when you exit the vehicle (and there is nobody inside). It will not fog up
as there is no moisture buildup. Except if everything inside is wet :lol:



Partial recirculation can be manually engaged on the Leafs with Heat button, and it doesn't come on automatically in the US models. This may be a European thing.

I've already documented the Floor only defrosting.

Leaving the car in Recirculate when unattended is a good tip. I'll add it.
2013 "Brilliant Silver" SV with Premium Package and no QC, and 2009 Vectrix VX-1 with 18 Leaf cells.

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LeftieBiker
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Re: The Best, Least-Known Tips & Tricks

Mon Jan 30, 2017 1:45 pm

IssacZachary wrote:I was testing out the Auto function to get recycle along with defrost.

It was 6°F when I left. The car was preheated. It is also very sunny. When I changed the climate control "thermostat" up or down it would go to floor only mode at higher temps and then bi-level mode at lower temps.

Then the outside temperature changed to 5°F and I noticed the change. By pushing Auto it would choose floor only mode at higher temps and defrost/floor mode at lower temps. And just as before, if I hit recirculation it will recirculate in defrost/floor mode.

I'm not sure what the inside temperature is but I had preheated it to 70°F an hour before leaving home and drove 5 miles across town before noticing this change.


It may be that the CC uses the outside temp only?
2013 "Brilliant Silver" SV with Premium Package and no QC, and 2009 Vectrix VX-1 with 18 Leaf cells.

The most offensive, tasteless phrase in use here is "Pulled the trigger." I no longer respond to posts that use it.

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IssacZachary
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Re: The Best, Least-Known Tips & Tricks

Mon Jan 30, 2017 1:52 pm

I just tried this again. It says 4°F outside and now it goes to bi-level. Wait! Now it went to floor only but automatically chooses level one fan.

Is there some sort of humidity sensor? If there's an automatic control on the recirculation door and some sort of logic behind choosing between defrost or not at cold temperatures then maybe there's some sort of humidity sensor that heroes the car decide what to do?? :?
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arnis
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Re: The Best, Least-Known Tips & Tricks

Mon Jan 30, 2017 1:55 pm

LeftieBiker wrote: Partial recirculation can be manually engaged on the Leafs with Heat button, and it doesn't come on automatically in the US models. This may be a European thing.


It does engage automatically if it is cold outside. It can be heard in a quiet environment.
Push AUTO, then hold recirc. Flaps do not actuate (light blinks). Choose fresh and then hold recirc, you can hear flap actuating.
Choose fresh and then choose AUTO and you can hear recirc flap actuating.

Actuation time between fresh-30%recirc is shorter than 30%recirc-100%recirc. And fresh-100%recirc actuation time is the longest.
Again, from 100% to partial can be heard if recirc is activated and AUTO has been pushed.

PS! Tech manual states specific outside temperature range when partial recirc will be used.
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arnis
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Re: The Best, Least-Known Tips & Tricks

Mon Jan 30, 2017 1:57 pm

IssacZachary wrote:I just tried this again. It says 4°F outside and now it goes to bi-level. Wait! Now it went to floor only but automatically chooses level one fan.

Is there some sort of humidity sensor? If there's an automatic control on the recirculation door and some sort of logic behind choosing between defrost or not at cold temperatures then maybe there's some sort of humidity sensor that heroes the car decide what to do?? :?


If there is sunshine then algorithm adjusts closer to summer mode (full face blowing).
Light sensor is on the right end of the dash next to defrost vents.
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IssacZachary
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Re: The Best, Least-Known Tips & Tricks

Mon Jan 30, 2017 2:02 pm

I was parked in the same spot. But I did turn off the car for a few minutes, then came back out, turned it on, and it was bi-level instead of floor/defrost.
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12 bars until 44,300 miles on June 2, 2017. :D
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