AC and Heat do not blow out of the vents!

20845 Views 52 Replies 23 Participants Last post by nycphuntsok2016, 3 mo ago

ASommers

Discussion Starter · Nov 9, 2020

I need Help!

I have a 2015 QX60
I have a 2 part issue

Part 1
My ac line contentious to freeze.... Its now cold and the heat is on.... this should not be happening.

Part 2
After driving the car for about 30 min the AC or Heat will not come out of the vents. The blower sounds like a jet engine by the glove box.

This issue has been going on for about a year now and I'm over it. I have taken this to a mechanic and they kept the car for a week and "Cant Replicate The Issue" Not sure what else to do. I don't have all the money in the world to take to multiple mechanics. I am Savvy when it comes to fixing things but not diagnostics.

Things that have been replaced
The AC lines have been blown out a few times.
New Compressor
New Blower Motor
New Cabin Air Filter

21 - 40 of 53 Posts

mikedexion

· #21 · Jun 4, 2021

luisjmir said:
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?

http://www.federatedautoparts.com/Docs/TTBulletins/S003E002.pdf

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

Infiniti QX60 Hvac air door actuator. Hvac mix door actuator. Hvac temperature door - 27732-A070A - Genuine Infiniti Part

Hvac air door actuator. Hvac mix door actuator. Hvac temperature door actuator. Infiniti QX60. Genuine Infiniti Part - 27732-A070A (27732A070A)

parts.infinitiusa.com

parts.infinitiusa.com

Good luck!

Reactions: 1

mikos

· #22 · Jun 4, 2021

mikedexion said:
Does this sound like your symptom?

http://www.federatedautoparts.com/Docs/TTBulletins/S003E002.pdf

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

Infiniti QX60 Hvac air door actuator. Hvac mix door actuator. Hvac temperature door - 27732-A070A - Genuine Infiniti Part

Hvac air door actuator. Hvac mix door actuator. Hvac temperature door actuator. Infiniti QX60. Genuine Infiniti Part - 27732-A070A (27732A070A)

parts.infinitiusa.com

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.

mikedexion

· #23 · Jun 4, 2021

mikos said:
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)

Reactions: 1

luisjmir

· #24 · Jun 5, 2021

mikedexion said:
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

· #25 · Jun 5, 2021

luisjmir said:
@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.

mikos

· #26 · Jun 14, 2021

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!

www.pathfindertalk.com

Erratic blower air volume output 2015 Pathfinder

Hi folks. I'm new to the forum. We are having an issue with erratic blower air volume output on our 2015 Pathfinder SV. On initially starting, HVAC system works normally in both a/c and heating modes. After a period of time from minutes to hours, air volume output from all vents will quickly...

www.pathfindertalk.com

www.pathfindertalk.com

Reactions: 1

JenF

· #27 · Jun 15, 2021

mikos said:
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!

Erratic blower air volume output 2015 Pathfinder

Hi folks. I'm new to the forum. We are having an issue with erratic blower air volume output on our 2015 Pathfinder SV. On initially starting, HVAC system works normally in both a/c and heating modes. After a period of time from minutes to hours, air volume output from all vents will quickly...

www.pathfindertalk.com

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.

Reactions: 1

mikos

· #28 · Jun 28, 2021

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.

JenF

· #29 · Jun 30, 2021

mikos said:
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

mikos

· #30 · Jun 30, 2021

JenF said:
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.

Reactions: 1

JenF

· #31 · Jul 5, 2021

mikos said:
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.

Timizzy9895

· #32 · Jul 10, 2021

mikos said:
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.

Timizzy9895

· #33 · Jul 10, 2021

How much did it set you back to have the dealer install the new AC Auto Amp? Is it something I can do myself?

PdrInfiniti

· #34 · Oct 15, 2021

3

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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Bsante

· #35 · Nov 18, 2021

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!

PdrInfiniti

· #36 · Nov 18, 2021

Module is very easy to get out and back in once you have the console stuff off. I was prepared for a full half day of work and it only took like an hour or hour and a half.

Bsante

· #37 · Dec 15, 2021

Bsante said:
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!

took 4 weeks but finally got my control unit. Maybe demand is up, maybe cause I’m in Canada, but in all cost me about $150. Made the module change just as pdrInfiniti posted and so far it’s working. This is a game changer and I’m shocked that Infiniti has not told their dealers about this fix.

Anyone with a very basic competency can do this. Beg your garage to change the module if you don’t want to touch it. A brand new module form Nissan was quoted to me from $280-$315….still worth it!

Reactions: 1

Bsante

· #38 · Dec 15, 2021

PdrInfiniti said:
Module is very easy to get out and back in once you have the console stuff off. I was prepared for a full half day of work and it only took like an hour or hour and a half.

Thanks so much for your videos! Took me less then an hour, a bit of an issue with the last fascia parts being put back in but no biggie at all. So happy….almost don’t believe it’s fixed

Whiskeyfire

· #39 · Feb 7, 2022

Sorry to bump this thread, I have a similar issue. There is no airflow out of the floor vents. If I change the setting back to the dash it works. When you all were having this issue was it affecting all vents?

Bsante

· #40 · Feb 8, 2022

yes, was all the vents, just slowly stopped working and wouldn’t go back on.

howeve, with the AC, it would lose its coldness, I’d turn off the AC, would be cold, thena few minutes would work again. I can’t yet say the HVAC module fixed that issue because I haven’t had a summer with this fix.

HOWEVER, what you’re describing is actually something that happened once recently. I read that some vents are controlled boy the BCU; body control unit. I have a feeling that is going to go next for me.

21 - 40 of 53 Posts