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A/C problems 2016 Nissan Quest. #5166347 07/20/19 01:37 PM
Joined: Aug 2003
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JTK Offline OP
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The a/c stopped working on our van. According to the darling bride, she "told me WEEKS ago" LOL. I gave it quick once over and didn't notice oily residue from either evap core drain tube, condenser, lines, etc. Off to the dealer it went given I have an extended warranty for another 10K miles or so. Currently have ~83K miles on the van. Day one at the dealer was troubleshooting and seeing if warranty would cover it. Day 2 was waiting for parts. Wrong part came in. Day 3 (Saturday), part came in, but tech won't have time to finish it today, but should be done on Monday. Apparently it's something with the rear a/c line(s), which I know is all too common for any such equipped vehicle in the rust belt as the lines in the right rear wheel take a beating. Thing is, this van is immaculate underneath being only a few years old.

Curious to see what the cost of repairs will add up to. I'm assuming the Quest, Murano and Pathfinder all have the same system given it's a shared chassis. Supposedly it shouldn't cost me anything. It better not given I paid ~$2K for the extended warranty when we bought the van used (1yr old ex rental with 32K miles) I hate rear HVAC. It's great when you need it, but when it leaks and it will with rust belt use, you loose everything.

Last edited by JTK; 07/20/19 01:48 PM.

2017 Ram 1500 4x4, 3.6L.
2016 Nissan Quest SV (Babe magnet IV)
2015 Nissan Versa 1.6 S
Re: A/C problems 2016 Nissan Quest. [Re: JTK] #5166402 07/20/19 03:02 PM
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cpayne5 Offline
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Yeah, rear HVAC just complicates things, but it is a nice creature comfort for those behind the first row.

In July two years ago we took our 2005 Suburban to Florida for two weeks. The rear a/c lines sprung a leak on the first day. I had a hard time trying to find a good automotive a/c shop in the area - your would think they'd be on every corner in Florida. I was hoping to find someone who could just splice the line and fix in place. No such luck. The shops wanted to order new line sets from the dealer and install them for some ungodly amount (labor). I ended up ordering a rear a/c block off kit and installing it in the driveway of our rental house. I then had a local shop do a vac and charge to get us home.

Re: A/C problems 2016 Nissan Quest. [Re: JTK] #5166404 07/20/19 03:04 PM
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JMJNet Offline
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It is difficult to patch because AC system is a high pressure system.
We cannot just put a Waterweld where it leaks.
Don't ask me how I know. LOL.


  • 2017 Toyota Sienna
  • 1995 GMC Suburban 6.5L Turbo Diesel


Re: A/C problems 2016 Nissan Quest. [Re: JMJNet] #5166418 07/20/19 03:16 PM
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Chris142 Offline
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Originally Posted by JMJNet
It is difficult to patch because AC system is a high pressure system.
We cannot just put a Waterweld where it leaks.
Don't ask me how I know. LOL.

I repair ac lines like mentioned every day. I weld fittings onto the existing line ( in the truck!)and crimp the new line in place with a hand held crimper.


02 Wrangler traveler sae30
87 F250 Valvoline 15w40
07 fjcruiser Chevron 10w30
Z400 castrol T 10w40
Can am maveric edge 5w40
57 case tractor Chevron sae30
Re: A/C problems 2016 Nissan Quest. [Re: JTK] #5166456 07/20/19 04:25 PM
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dishdude Offline
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I'm guessing it was only the rear that wasn't working or you would have heard about it immediately! Although I would think it would be all one system.


2018 Challenger SRT 392 PUP 0w-40 Wix 57899XP
2018 GTI
2019 Tiguan
Re: A/C problems 2016 Nissan Quest. [Re: dishdude] #5167458 07/21/19 05:08 PM
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JTK Offline OP
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Originally Posted by dishdude
I'm guessing it was only the rear that wasn't working or you would have heard about it immediately! Although I would think it would be all one system.


A rear HVAC leak takes the whole system out unfortunately.


2017 Ram 1500 4x4, 3.6L.
2016 Nissan Quest SV (Babe magnet IV)
2015 Nissan Versa 1.6 S
Re: A/C problems 2016 Nissan Quest. [Re: JTK] #5167637 07/21/19 09:17 PM
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dishdude Offline
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Originally Posted by JTK
Originally Posted by dishdude
I'm guessing it was only the rear that wasn't working or you would have heard about it immediately! Although I would think it would be all one system.


A rear HVAC leak takes the whole system out unfortunately.


I figured. But even in Buffalo, this and the radio breaking are the two things I'd think you'd be hearing about everyday until fixed!


2018 Challenger SRT 392 PUP 0w-40 Wix 57899XP
2018 GTI
2019 Tiguan
Re: A/C problems 2016 Nissan Quest. [Re: JTK] #5168066 07/22/19 12:49 PM
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cronk Offline
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I replaced the rear heat/ac lines in our 2011 Quest this spring.
Was a pretty big job, had to drop the rear cradle down to fish the lines through. Luckily my buddy helped and we did it on his 2 post lift so it wasnt that bad.
The lines were very expensive, I work for a dealership so I got them at 10% over cost and I think it was still close to $700.
I sprayed the new ones down with Amsoil Metal protector to hopefully help them last longer, plan on spraying annually.
Mine looked like they were leaking in front of the rh rear wheel where it looks like they are subject to road spray coming off the tire.
Be glad you got it covered under warranty.

This has been the only major repair so far on our Quest.


2008 Ford F350
2003 Chevy Cavalier
2011 Nissan Quest
1986 Pontiac Trans Am
1940 Ford 9N Tractor
Amsoil lubes and filters!
Re: A/C problems 2016 Nissan Quest. [Re: JTK] #5168076 07/22/19 12:59 PM
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KrisZ Offline
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It's also a known problem on Grand Caravans/T&Cs.

On my minivan, aside from spraying the area with rust proofing oil, I was able to fashion a red neck protective cover so the lines are not exposed to direct spray coming from the rear tire. It seems to be working so far.

[Linked Image]


2015 Grand Caravan 3.6L - 31k miles.
2006 Mazda 3 2.0L - 171k miles
Re: A/C problems 2016 Nissan Quest. [Re: JTK] #5168123 07/22/19 02:02 PM
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JTK Offline OP
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Got the van back today. "Replaced rear AC lines from rear subframe to evaporator core". Per the write up, it was two separate pipe assembles to the tune of $534.98, some refrigerant, coolant and $480 labor. Total was $1092.86. Aftermarket extended warranty (which was sold through this dealership chain) covered it all.

From what I can see in the r/r wheel well and under the van, none of lines look new to me, but the a/c is cold once again.

I'm kind of surprised they didn't try to sell me a cabin air filter or anything else given the van is a 2016 with ~84K miles on it, but I guess were talking a Nissan. It'll probably be back. LOL


2017 Ram 1500 4x4, 3.6L.
2016 Nissan Quest SV (Babe magnet IV)
2015 Nissan Versa 1.6 S
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