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I continue to have this issue as well. This is super annoying. Can't pinpoint it for the life of me, but it is certainly something that only happens after you drive it for 10 to 15 minutes. I am due for a cabin filter change so I'm going to try that solution and report back if it helps me any.
Does this sound like your symptom?

Quote: n. The HVAC blend door motor / air door actuator directs the flow of air in the vehicle’s cabin. If the motor burns out or the shaft cracks, the “door” can get stuck in one position, leading to improper ventilation

Here is the part: Part Number: 27732-A070A

Good luck!
 

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Does this sound like your symptom?

Quote: n. The HVAC blend door motor / air door actuator directs the flow of air in the vehicle’s cabin. If the motor burns out or the shaft cracks, the “door” can get stuck in one position, leading to improper ventilation

Here is the part: Part Number: 27732-A070A

Good luck!
Appreciate the input. I have asked my dealer about this specifically and cannot get a straight answer. Do you know if the blend door motor / actuator fails, will it resent itself and fail over and over? Seems many of us have the issue where the blower is blocked after a period of time but if you let the car rest, say for an hour, it will resent and be open allowing air to flow for a little bit before closing again.
 

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Appreciate the input. I have asked my dealer about this specifically and cannot get a straight answer. Do you know if the blend door motor / actuator fails, will it resent itself and fail over and over? Seems many of us have the issue where the blower is blocked after a period of time but if you let the car rest, say for an hour, it will resent and be open allowing air to flow for a little bit before closing again.
I cannot really say because I've yet to experience this HOWEVER there seem to be two issues in this thread.
Issue #1 Blower is blowing, but air is not coming out of the vents
Issue #2 Air stops being either cold or hot after driving at high speeds for 15 minutes give or take.

If you are experiencing Issue #1 that function is the responsibility of the blend motor and door. If its #2 then I do not know what you'd need... But it sounds like a faulty thermostat (if heat stops) or faulty evap core/compressor (if cold stops)
 

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I cannot really say because I've yet to experience this HOWEVER there seem to be two issues in this thread.
Issue #1 Blower is blowing, but air is not coming out of the vents
Issue #2 Air stops being either cold or hot after driving at high speeds for 15 minutes give or take.

If you are experiencing Issue #1 that function is the responsibility of the blend motor and door. If its #2 then I do not know what you'd need... But it sounds like a faulty thermostat (if heat stops) or faulty evap core/compressor (if cold stops)
@mikedexion - thanks for looking this up for us. It could be our issue, but I just wanted to clarify that I believe issue #1 and issue #2 are a single issue.

Car starts up and heater or AC are operating normally. After 15 minutes, the blower continues to run and sound like it is blowing and yet no air (hot if running heater or cold if running AC) comes out if the vents. If you park the car and let it rest and start up again, heater or AC operate normally, meaning you hear the blower and air at comes out if the vents. Again you drive for 15 minutes and air just stops coming out the vents but you can hear the blower fan operating.

Now when I've experienced the issue and got parked in the garage, while the car is running and the blower is running and NO air is coming out of the vents, as i change the air from straight to floor to defrost I do hear the noise of some doors moving inside if the vents. A motor is switching the air direction and yet no air comes out of any of the vents straight (dash), floor or defrost (by front windshield). If i turn off the car and let it rest, when i turn it on, air is blowing out if the vents as expected. Until i get to driving for 15 min...

Hope the detail helps someone out there narrow it down.

Thanks for looking things up and trying to help out. It is appreciated.
 

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@mikedexion - thanks for looking this up for us. It could be our issue, but I just wanted to clarify that I believe issue #1 and issue #2 are a single issue.

Car starts up and heater or AC are operating normally. After 15 minutes, the blower continues to run and sound like it is blowing and yet no air (hot if running heater or cold if running AC) comes out if the vents. If you park the car and let it rest and start up again, heater or AC operate normally, meaning you hear the blower and air at comes out if the vents. Again you drive for 15 minutes and air just stops coming out the vents but you can hear the blower fan operating.

Now when I've experienced the issue and got parked in the garage, while the car is running and the blower is running and NO air is coming out of the vents, as i change the air from straight to floor to defrost I do hear the noise of some doors moving inside if the vents. A motor is switching the air direction and yet no air comes out of any of the vents straight (dash), floor or defrost (by front windshield). If i turn off the car and let it rest, when i turn it on, air is blowing out if the vents as expected. Until i get to driving for 15 min...

Hope the detail helps someone out there narrow it down.

Thanks for looking things up and trying to help out. It is appreciated.
Ok, that sounds like the blend actuator or door is not functioning properly. Air being routed through the vents is the responsibility of that part. If the blower is blowing but air is not coming to you, I don’t see what else it could be. I’d first start by replacing that part.
 

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I think we are getting closer to the issue. Take a look at the Pathfinder thread I found, same issue as the QX60. It seems the AC Auto Amp is failing and causing the evap coil to freeze up and block the airflow. Makes sense that when you let the car "rest" it resets itself. My regular mechanic thought this was the case but couldn't trace the issue.

In the thread, the 2014 part fixes the issue while the 2015 issue does not. I think this is a manufacturer issue and is not just normal wear and tear. No wonder any good mechanic could not figure it out, it's the wrong part!

 

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I think we are getting closer to the issue. Take a look at the Pathfinder thread I found, same issue as the QX60. It seems the AC Auto Amp is failing and causing the evap coil to freeze up and block the airflow. Makes sense that when you let the car "rest" it resets itself. My regular mechanic thought this was the case but couldn't trace the issue.

In the thread, the 2014 part fixes the issue while the 2015 issue does not. I think this is a manufacturer issue and is not just normal wear and tear. No wonder any good mechanic could not figure it out, it's the wrong part!

If you're trying to narrow down the list of possible causes that should be an easy one to rule out if it's not the issue. A frozen evap coil turns into a block of ice. If after "resting" it is working again that means it would have had to have melted enough to stop impeding the airflow. You'd notice a significantly large puddle under the car after the rest period if this was the issue, as the melted ice would have to drain. Next time this happens to you check for the puddle underneath, if there's no puddle feel your carpet to see if it's wet. If there's no puddle and no wet carpet your evap coil is not frozen. If the carpet is wet your evap drain line is plugged. The most common cause of a frozen evap coil is a clogged drain line, both on cars and all hvac units.
 

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I had the 2014 AC Auto Amp installed in my 2015 QX60 and it solved the issue. I put over 2,000 miles on it in the last two weeks with no issues. Ran it on "Auto" the entire time and it worked as it should. Have your mechanics look at this but take heed about the potential parts catalog mismatch.
 

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I had the 2014 AC Auto Amp installed in my 2015 QX60 and it solved the issue. I put over 2,000 miles on it in the last two weeks with no issues. Ran it on "Auto" the entire time and it worked as it should. Have your mechanics look at this but take heed about the potential parts catalog mismatch.
So the part number you installed does not match the part number you removed? Or you installed the identical part and it's just mislabeled on the dealer parts catalog? I'm trying to help a friend fix his with the same problem. I'm about to suggest getting one out of a wrecked car from eBay for cheap money just in case that's not the issue but it sounds like it is
 

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So the part number you installed does not match the part number you removed? Or you installed the identical part and it's just mislabeled on the dealer parts catalog? I'm trying to help a friend fix his with the same problem. I'm about to suggest getting one out of a wrecked car from eBay for cheap money just in case that's not the issue but it sounds like it is
I had the dealer put in a 2014 AC Auto Amp in my 2015 QX60. If you read the Pathfinder forum link I posted, there are the actual part numbers in that thread.

Technically I put the “wrong” part in my car. In the thread, a mechanic even tested it with a 2015 part and it didn’t work.
 

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I had the dealer put in a 2014 AC Auto Amp in my 2015 QX60. If you read the Pathfinder forum link I posted, there are the actual part numbers in that thread.

Technically I put the “wrong” part in my car. In the thread, a mechanic even tested it with a 2015 part and it didn’t work.
Thanks I read through the Pathfinder forum and it sounds like most of the owners that used the 2014 part had replaced their compressors with what might have been a 2014 compressor incorrectly listed as fitting a 2015. My friend didn't have any parts replaced and it was working fine until he hit a turkey on the highway. I don't see how that could have caused the ac amp to crap out, but he's going to try the 2015 amp first and see if it's good. Thanks for the link to the Pathfinder forum.
 

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Most people should be able to do this themselves. I am really thankful that I found this forum and the Pathfinder one listed above. My ac compressor went on my 2015 Qx60, local mechanic (he's slow, but good and fair) replaced it. Right after that i started experiencing the no air flow after 15-20 minutes of highway driving. I told him what I found on this forum and he basically laughed at me. A week later I got it to actually happen and took it by his shop. He checked it out for a little while and then he said with no irony "gee I'm going to have to Google this issue."
So I decided to go ahead and order the 2013-15 pathfinder part off of eBay for 14 bucks + shipping. I replaced the module and then took the car on a 700 mile multi day trip. No issues whatsoever it completely fixed the problem.
This is the one I put in
27760-3ka3a
Line Font Gas Technology Screenshot


This is the one that I took out of the car
Material property Gas Font Rectangle Gadget


This is the YouTube video I referred to to remove center console and put back together.

So for about $20 and and an hour of my time the problem was fixed.

Hope this helps someone

Car Vehicle Mirror Motor vehicle Plant
Line Font Gas Technology Screenshot
Material property Gas Font Rectangle Gadget
Car Vehicle Mirror Motor vehicle Plant
 

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Looking forward to getting my control module ASAP. Just in preparation, I assume the module is easily seen behind the radio once it’s out?

man’s thank you for the videos as well!
 
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