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TSB #24-001-20 A/C Fix. Has anyone had it done yet? Plus are you happy with the results?

brian42

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What's the harm in letting them check to make sure your system is functional before they go ripping your dash apart?

I know it's a hassle, but maybe let them eliminate the other possibilities on their checklist before they get into doing the TSB.
Actually FCA requires that they have to check & diagnose the issue first, probably in an effort to avoid having to do the TSB for some. Dealer has little to no say over this. And yes, we all know that this first service call will not fix the issue, just something we need to do. In my case, they took the truck back and and two hours later returned it saying the freon was low, so they filled it. They did say try it now and if I still had issues, bring it back and they would do the TSB. I now have an appointment Monday to get the ball rolling, most likely just to order parts for a latter install.
Then it should be listed on the TSB. I have complained 4 times before the TSB and twice since the TSB was issued and all 6 times have been told that my A/C is fine and no repair authorized.

This is the only vehicle I've every owned that if it's over 75F and the sun is out that my back sweats with MAX A/C and maximum fan speed.
 

bass3859

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What's the harm in letting them check to make sure your system is functional before they go ripping your dash apart?

I know it's a hassle, but maybe let them eliminate the other possibilities on their checklist before they get into doing the TSB.

Actually FCA requires that they have to check & diagnose the issue first, probably in an effort to avoid having to do the TSB for some. Dealer has little to no say over this. And yes, we all know that this first service call will not fix the issue, just something we need to do. In my case, they took the truck back and and two hours later returned it saying the freon was low, so they filled it. They did say try it now and if I still had issues, bring it back and they would do the TSB. I now have an appointment Monday to get the ball rolling, most likely just to order parts for a latter install.

Then it should be listed on the TSB. I have complained 4 times before the TSB and twice since the TSB was issued and all 6 times have been told that my A/C is fine and no repair authorized.

This is the only vehicle I've every owned that if it's over 75F and the sun is out that my back sweats with MAX A/C and maximum fan speed.
No harm. I would rather not have my entire dash ripped out, but I would like to have my A/C blow cold air. 95 degrees and 80% humidity come summer time, with 55 degree air coming out of my vents does not make for a comfortable drive.

The fact of this matter is there is a problem with the original design of the HVAC system, which is still in my truck, as well as every other 2019 Ram and some 2020 Rams that has not had the redesigned components installed. The existence of other issues does not eliminate this fact. That is why the system was redesigned. Then, with a document that says what the diagnosis procedure is, which makes no mention of completing any actual diagnostic procedures, the information I receive is that diagnostic procedures have to be completed, contradictory to the diagnostic procedure specified in the TSB. If diagnostic procedures need to be performed other than what is listed in the TSB, shouldn't these procedures be noted in the TSB?

They can not properly diagnose this issue because the “passing” baseline numbers of the cool down test are originally based off of a faulty HVAC system. This is the EXACT reason that this TSB is a “customer concern” TSB. If the symptoms are described, it gets fixed. That is why the very last paragraph of the TSB instructs the dealer to use fault code CC for the repair. That means they get paid no matter what.

As was previously mentioned, if they perform the cool down test, the numbers, at least for my truck, will likely fall within the satisfactory range. They did last year when I took it in based on the many page thread about the A/C hack. At the time, these numbers are based on a poorly designed HVAC system. Unless they have updated the acceptable performance specifications based on the redesigned system, my truck will likely provide diagnostic results that are in the satisfactory range, but based off a faulty system.

When a customer brings in a vehicle for an issue, is it common practice to review TSB's to see if the issue expressed by the customer has been previously identified? Or, do they just perform diagnostics and if the problem is still not resolved, then review the TSB's? Because the second question is what I am experiencing.
 

Neurobit

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My advisor just emailed me.

Mentioned that they had to do a software update for the HVAC module that needed to be installed as part of the verification process, Now that all diagnostics have been completed, they are able to get the parts and do the TSB, so looks like it's finally going to get done. Parts arrive tomorrow so I will have an update then.

This has been an almost three-year saga. Glad it's finally getting resolved.
Just picked up the truck.
It‘s not too terribly hot so I won’t know for sure if better yet, but in LO it seems to be blowing colder than before. I’ll update once the cold front goes away and I can do proper testing.

P.S. Dash is tight with no rattles or damaged trim.

Cheers,
 

Scap

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Just picked up the truck.
It‘s not too terribly hot so I won’t know for sure if better yet, but in LO it seems to be blowing colder than before. I’ll update once the cold front goes away and I can do proper testing.

P.S. Dash is tight with no rattles or damaged trim.

Cheers,

C'mon 70* @ 90% humidity feels great outside! Lol
 

Neurobit

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Update. Currently at the dealer again.

AC stopped working as soon as I started the truck again last night.

I don’t want to scare anyone into not doing this. I am thinking it may be a loose connection, as the vent fan is not blowing in any speed or mode, AC or heat, period. Hopefully something they can figure out quickly so I can be on my way.

On Edit: See a couple of posts below: It was a lose connector like I suspected. They fixed it and it has been fine ever since.
 
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SCasey89

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Do we know if this TSB is the answer to Star Case S2024000003? The Star Case concerns a whistling noise owners experience from the HVAC housing/system under certain conditions. The Star Case was released in September 2020 and stated "Service updates are in process and may include component and/or software changes to improve the operation and customer driving experience. The service updates are expected by the end of 3rd Quarter 2020" This TSB was released in Nov. 2020, so I'm jus curious if it contains the changes that were referenced.

I get a distinct whistle from the HVAC housing under the passenger side dash at any speed above 40 mph. It's particularly noticeable with the AC on. Turning on/off the recirculation mode doesn't make a difference. I can only hear a difference when I turn the fan completely off (whistle goes away).
 

Neurobit

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Do we know if this TSB is the answer to Star Case S2024000003? The Star Case concerns a whistling noise owners experience from the HVAC housing/system under certain conditions. The Star Case was released in September 2020 and stated "Service updates are in process and may include component and/or software changes to improve the operation and customer driving experience. The service updates are expected by the end of 3rd Quarter 2020" This TSB was released in Nov. 2020, so I'm jus curious if it contains the changes that were referenced.

I get a distinct whistle from the HVAC housing under the passenger side dash at any speed above 40 mph. It's particularly noticeable with the AC on. Turning on/off the recirculation mode doesn't make a difference. I can only hear a difference when I turn the fan completely off (whistle goes away).
IDK, but I don’t see that star case referenced on my worksheet (and I did not have that issue to begin with).

Here’s a detail on work they did on mine:

B7F456CA-D39A-4E5D-84CA-9E0BD006D95B.jpeg 713B712E-D985-402F-92F5-9486EC378D51.jpeg
 

Scap

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Did you buy from Helfman?
They are closer to me than Tomball (where I bought), so might consider using them for service.

I live closest to NW, but they are beyond worthless.
 

Neurobit

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Did you buy from Helfman?
They are closer to me than Tomball (where I bought), so might consider using them for service.

I live closest to NW, but they are beyond worthless.
I did not, yet the service I get from them is sterling. Highly recommend them. They’ve resolved every issue and never damaged my truck.
 

theblet

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Didn’t know about this issue. Just got my 19 a few months ago. Is the TSB free only under warranty?
 

Nukegm426

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Tsb’s are separate from the warranty... so even if your warranty expired they can still do the tsb for free.
 

cdn.tbird

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It's only 53F outside today so I'll have to wait till things warm up to redo the measurements. I did measure a 6 degree difference between the driver & passenger vents along with a 3 ft/s difference in airflow. Last summer I didn't do a lot of driving so I thought it was just my impression but something is definitely off with my AC.
 

ramchaser

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I have had the repair done and my vent temps will only get down to 47F...Anyone else had this done and can post their vent temps on the center vents? Curious how mine compares post repair on a 70F degree day.
 

Neurobit

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Problem solved. It was a loose connector.

View attachment 90065
It’s rather cool here today, but I did have chance to run it earlier when it was in the 70’s and AC does blow a lot colder than before. True test will be when it gets >90s. I’ll update the thread if anything changes.

Def glad I got this done.
 

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