EddyKilowatt
Posts: 12
Joined: Tue Oct 15, 2013 11:56 am
Delivery Date: 13 Oct 2013
Leaf Number: 417462

Defrost AND Recirc

Fri Dec 05, 2014 3:53 pm

I have a 2013 S, so feel lucky that I have the 99%-improved HVAC controls... but there's one little thing that still needs fixing.

I'm fine with the idea that pushing the Defrost button (top row center) kicks the system out of Recirc and prevents its use. A one-button, idiot proof, "give me max defrost NOW" function is a good thing... I use mine sometimes in heavy traffic when I don't want to mess with the other buttons.

My little nitpick is that when selecting air distribution (bottom row center) in non-defrost scenarios, selecting any setting that directs air at the windshield ALSO cancels and prevents recirc. This is an annoying level of nannyishness; there are many cold-weather instances where one has air going to the windshield, a bus or truck in front belches a black cloud, you stab the recirc button, and... nothing. Or rather, enjoy "essence de diesel" wafted into your face.

This would literally be one line of code to change somewhere, but would be a significant improvement in the driving experience.

LeftieBiker
Posts: 5670
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 31 May 2013
Location: Upstate New York, US

Re: Defrost AND Recirc

Fri Dec 05, 2014 9:12 pm

Yes, there should at least be an override button, like a Recirculate button on the wheel that closes the recirculate door in any mode, even if it opens again a few minutes later. There are also conditions, like heavy rain, in which the defroster can work better in recirculate mode (with the A/C on)...
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.

kovalb
Posts: 372
Joined: Tue Jun 28, 2011 12:37 pm
Delivery Date: 09 Apr 2014
Location: Phoenix

Re: Defrost AND Recirc

Sat Dec 06, 2014 8:00 am

LeftieBiker wrote:there should at least be an override button,...

There is. It is the recirc button. It will permit recirc except in defrost mode, if memory serves. Running heated air in recirc is the quickest way to fog your windows up.

We just had some unusual weather in Phoenix. It rained. The morning temp was around 50° and the humidity was high. The first day I found that running in defrost mode with the A/C on and the heat off was very effective. It maintained comfort and used very little power (turn off A/C for +1 mile). The next day it was less humid and felt cooler. I found that running in def/foot mode with the heat on (77°) and A/C off worked best to maintain comfort while keeping the glass clear while consuming minimum power (turn off A/C for +1 mile). This was all in fresh mode.

I have a 15MY SV with heat pump. I try to avoid using both heat and A/C at the same time to avoid the PTC heater from turning on. This conserves power. However I still use both when windows start to fog to quickly clear them. Never use recirc when humidity is elevated.
2015 LEAF SV Pearl White
My sixth Nissan LEAF
Nissan Employee (NTCNA-AZ). Opinions expressed here are my own.

Zootjeff
Posts: 13
Joined: Tue Dec 24, 2013 9:34 am
Delivery Date: 24 Dec 2013

Re: Defrost AND Recirc

Sat Mar 21, 2015 12:04 am

kovalb wrote:
LeftieBiker wrote:there should at least be an override button,...

There is. It is the recirc button. It will permit recirc except in defrost mode, if memory serves. Running heated air in recirc is the quickest way to fog your windows up.

You completely missed the point. I often want to have the air on the windshield, as well has have recirc in a high humidity scenario. I got a fricken electric car because I hate fumes and have asthma. The fact that I can't run the ac compressor and have recirc on while putting all the air on the windshield is ridiculous. My acura will let me do this.. It is fine by default to cancel recirc if I press defrost, but if I then press recirc, FRICKEN LET ME DO IT! That is the way Acura does it as well as many other car types. I don't understand why Nissan wants me to have to breath exaust fumes. I understand fresh air will defrost faster. That is not the point. The ac compressor will also defrost in recirc mode.

This is my biggest pet peeve of the leaf. I battle this feature/design-flaw almost every time I drive when it is rainy out..

TimLee
Posts: 2810
Joined: Thu Jan 20, 2011 9:40 am
Delivery Date: 17 May 2011
Leaf Number: 2026
Location: Chattanooga, TN

Re: Defrost AND Recirc

Sat Mar 21, 2015 12:38 am

Zootjeff wrote:...It is fine by default to cancel recirc if I press defrost, but if I then press recirc, FRICKEN LET ME DO IT! That is the way Acura does it as well as many other car types. I don't understand why Nissan wants me to have to breath exaust fumes. I understand fresh air will defrost faster. That is not the point. The ac compressor will also defrost in recirc mode.

This is my biggest pet peeve of the leaf. I battle this feature/design-flaw almost every time I drive when it is rainy out..

Agree with you completely.
Often have to turn HVAC off to avoid getting fumes in the car from someone with old engine that is smoking badly or second hand smoke in drive through.
But I can see it is a much bigger problem for you.

Another one of LEAF's design flaws like dangerously grabby brakes and excessive unnecessary creep.
Last edited by TimLee on Thu Mar 26, 2015 4:38 pm, edited 1 time in total.

Tim Lee
Chattanooga, TN

Man. Date: 03/10/11, VIN # 2026
Delivered 05-17-2011
Blue Ocean, 2011 SL-eTec

LeftieBiker
Posts: 5670
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 31 May 2013
Location: Upstate New York, US

Re: Defrost AND Recirc

Sat Mar 21, 2015 3:12 am

The closest you can come to getting around this is to leave the mode in Floor only. Leave the air intake open, and enough air will get to the windshield through the defrost vents to keep it clear. You can then hit Recirculate as needed, to block exhaust fumes. If you need to keep it closed a while and it isn't freezing out, you can also run the A/C this way.
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.

XeonPony
Posts: 311
Joined: Sun Nov 03, 2013 5:58 pm
Delivery Date: 03 Nov 2013
Leaf Number: 413826
Location: Yorkton, sask, Canada

Re: Defrost AND Recirc

Thu Mar 26, 2015 9:06 am

during very humid cold days recirc is by far more efficient then open loop. Given the methode the leaf uses there is zerro need to bring in out side air to defog the windows providing your primary ptc heater is working.
2013 SV Leaf, Level 2 charger, so far all works great! 130Km daily, 100% charge at night on 240 then trickle charge for 8H durring the day on 120v.

Level 2 charge starts at 130am environmental starts at 6am to 25c for a toasty warm defrosted car!

Zootjeff
Posts: 13
Joined: Tue Dec 24, 2013 9:34 am
Delivery Date: 24 Dec 2013

Re: Defrost AND Recirc

Thu Mar 26, 2015 9:11 am

XeonPony wrote:during very humid cold days recirc is by far more efficient then open loop. Given the methode the leaf uses there is zerro need to bring in out side air to defog the windows providing your primary ptc heater is working.



I hope Nissan fixes this massive design flaw. Health and safety are at stake here..

BrockWI
Posts: 483
Joined: Fri Mar 28, 2014 6:28 am
Delivery Date: 28 Mar 2014
Leaf Number: 423875
Location: Green Bay, WI.
Contact: Website

Re: Defrost AND Recirc

Thu Mar 26, 2015 1:08 pm

How hard would it be to make it so it just never pulled outside air in? I mean it is an electronic switch or servo that moves it from outsides to inside right? Couldn't it just be set to recirc and then unplug the servo? Or is it not that simple?
3 kw solar pv - XW6048 - 8 L16's
4 ton GSHP
2003 VW TDI 170k miles - 52 mpg lifetime
evse level 2 - Clipper Creek HSC-40
2013 S model with QC package Mar of 2013

LeftieBiker
Posts: 5670
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 31 May 2013
Location: Upstate New York, US

Re: Defrost AND Recirc

Thu Mar 26, 2015 2:12 pm

BrockWI wrote:How hard would it be to make it so it just never pulled outside air in? I mean it is an electronic switch or servo that moves it from outsides to inside right? Couldn't it just be set to recirc and then unplug the servo? Or is it not that simple?


You wouldn't like that situation as the air inside the car would get stale very quickly. In fact, when these cars are new the interiors out-gas quite a bit, and the air would quickly become pretty toxic. You would also have to run the AC almost constantly to keep the air dry enough.
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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