lkkms2
Gold Member
Posts: 318
Joined: Wed Jul 20, 2011 8:10 am
Delivery Date: 30 Dec 2016
Leaf Number: 302025
Location: San Diego/National City, CA

Re: 2011 Leaf SL : Heater not heating (shows zero energy usage)

Wed Feb 01, 2017 5:40 am

You have described the conditions and steps when you are trying to turn on the heater.

Are you trying to heat while plugged in to an EVSE? Or while driving?

If you are trying to preheat while plugged in you have to be charging for the heater to turn on manually (unless you could remotely command climate control, but the AT&T 2g wireless has probably been turned off).

If you are driving, best to leave in D, not Eco, to get heating working faster.

What is your ambient temperature and what temperature do you set your heater to??
2011 Leaf SL purchased 6-22-2011, sold 1-18-2017 with new battery.
2017 Leaf SV with Premium Package purchased 12-30-2016

brycenesbitt
Posts: 103
Joined: Sun Jan 31, 2016 8:48 pm
Delivery Date: 01 Feb 2016

Re: 2011 Leaf SL : Heater not heating (shows zero energy usage)

Wed Feb 01, 2017 9:56 am

For a while, I had a climate control timer set to 8am, my departure time. But the car stopped actually warming up some months ago.

The there is zero heat from climate timer, while driving, and when using the defrost button. A/C works fine. D vs. ECO is not the issue.

Exterior temperatures are in the 40's to 50's, and internal temperature is set to anything the entire range (I think 90 F is the max). Cold air in all cases. Dealer price for repair seems nearly $4000. The local third party garage wants to try a fix, but does not really have the parts or knowledge: http://mynissanleaf.com/viewtopic.php?f ... &hilit=PTC

User avatar
DuncanCunningham
Posts: 516
Joined: Thu Mar 26, 2015 10:02 am
Delivery Date: 15 Apr 2015
Location: Bountiful, UT

Re: 2011 Leaf SL : Heater not heating (shows zero energy usage)

Wed Feb 01, 2017 11:42 am

do you have the heater switch mod?

I had an issue with my A/C not switching on last year. I removed the mod cable. Ran leafspy and cleared all the DTC codes and the A/C came back. I told LOR about it and he thinks that just disconnecting the battery for 30 secs would have achieved the same thing.

it's worth a try, right?

Getting my 2012 SL to do what i want with regard to heating cooling, using heat or A/C and not both is a frustration to say the least. My Wife has a 2015 S and it has the heater off button and the car does what we want it to do generally.
Statler: Wake up you old fool. You slept through the show.
Waldorf: Who's a fool? You watched it.

2015 Leaf S (leased until May 2018, Bought out in Jan 2017)
2012 Leaf SL (purchased May 2015)

NeilBlanchard
Posts: 618
Joined: Sat Oct 11, 2014 5:02 pm
Delivery Date: 14 Oct 2014
Leaf Number: 306278

Re: 2011 Leaf SL : Heater not heating (shows zero energy usage)

Wed Feb 08, 2017 11:13 am

brycenesbitt wrote:
NeilBlanchard wrote:My sister-in-law's 2011 had the heater fail - they replaced it for free. I think it is a design defect.


Replaced it for free when? Under warranty?
I did try the Nissan dealer and they said 'no service bulletin exists for this'.


Yes, under warranty. It would have cost a lot, if they have had to pay for it.

brycenesbitt
Posts: 103
Joined: Sun Jan 31, 2016 8:48 pm
Delivery Date: 01 Feb 2016

Re: 2011 Leaf SL : Heater not heating (shows zero energy usage)

Mon May 01, 2017 9:12 am

Car is at the dealer now. They spent days looking for the cause, finally settling on the DC DC Junction box, and some fuses burried inside.
See also:
http://gm-volt.com/forum/showthread.php ... af-No-Heat

Has anyone taken out a DC DC converter block?

dagbja
Posts: 3
Joined: Tue May 01, 2018 3:08 pm
Delivery Date: 01 May 2018
Leaf Number: 004876

Re: 2011 Leaf SL : Heater not heating (shows zero energy usage)

Tue May 01, 2018 3:24 pm

Just had the same problem with my 2011 Leaf. The PTC heater has a high voltage (400V) control circuit on one side, and coolant on the other side. The seal had failed, so coolant got into the control circuit and short circuited the 400V connection. That blew a fuse in the DC/DC junction box (which distributes 400V from the battery to A/C compressor, heater, motor and charge port). Unfortunately, the fuse is not serviceable (not a standard type, not available from Nissan). So I bought a new heater and junction box from Nissan for $2350 and replaced them myself. Nissan quoted me $4300 for the job, which is not unreasonable. It's a big job, which should only be attempted by a fairly experienced home mechanic, who UNDERSTANDS THE SAFETY RISKS INVOLVED WITH HIGH VOLTAGE CIRCUITS.

So yes, if your heater doesn't work, you most likely need a new heater and DC/DC junction box, and it will be expensive :(

dagbja
Posts: 3
Joined: Tue May 01, 2018 3:08 pm
Delivery Date: 01 May 2018
Leaf Number: 004876

Re: 2011 Leaf SL : Heater not heating (shows zero energy usage)

Tue May 01, 2018 3:37 pm

Just missed brycenesbitt's post. If you are up for the job, get Nissan's technical manual online. You need to remove the inverter, and some cowl extension stuff (wipers etc) to get the junction box out. It's tricky to get out, and it's a bit heavy, so a helper is recommended. One tricky part is a metal coolant pipe assembly bolted to the back of the junction box- need to feel your way to a 10mm bolt. You also need to disconnect 2 brake lines so remember to flush brake fluid afterwards!!! And disconnect both the HV (high voltage) safety plug (floor between rear seats) and the connector in front of the battery before starting!! 400V is no joke.

brycenesbitt
Posts: 103
Joined: Sun Jan 31, 2016 8:48 pm
Delivery Date: 01 Feb 2016

Re: 2011 Leaf SL : Heater not heating (shows zero energy usage)

Tue May 01, 2018 6:03 pm

I posted photos of my job online somewhere. The only part I had to buy was the $30 fuse block, and some washers I used to adapt. The fuse was easy, getting there was.... deep surgery. If you've still got the entire module, I can show you how to take it apart and replace just the fuse. You can probably resell it for $1000 or more. Should take under a hour to replace the fuse.

dagbja
Posts: 3
Joined: Tue May 01, 2018 3:08 pm
Delivery Date: 01 May 2018
Leaf Number: 004876

Re: 2011 Leaf SL : Heater not heating (shows zero energy usage)

Wed May 02, 2018 11:50 am

Nice!! :D

I was thinking about jerry-rigging a fuse, but I'm too cautious to take the risk of what could happen if the connection came loose. Also I'd hate to do the job over if it failed.

Now I have a couple of compatible fuses, should the heater fail again (which I'm sure it will, given enough time :? )

brycenesbitt
Posts: 103
Joined: Sun Jan 31, 2016 8:48 pm
Delivery Date: 01 Feb 2016

Re: 2011 Leaf SL : Heater not heating (shows zero energy usage)

Wed May 02, 2018 4:18 pm

I found the 30A DC fuse model Nissan used based on some Internet pictures. I had a choice: buy the exact fuse in quantity 240, or a close match of different lead style. I chose the later, I was super nervous trying it out the first time: there was no way to test anything prior to basically reassembling everything,.

But it's been good through an entire winter.
What a pain to just change a fuse.


dagbja wrote:Nice!! :D
I was thinking about jerry-rigging a fuse, but I'm too cautious to take the risk of what could happen if the connection came loose. Also I'd hate to do the job over if it failed.

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