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Inconsistent air conditioning A/C performance with new Model Y

jcanoe

Active Member
Oct 2, 2020
3,445
3,503
Maryland
I do have a second SC appointment pending at a different location for this same issue, but it looks like they want to charge me this time. The app is asking me to accept a 100.00 estimate for labor.

Is it possible to actually talk to the techs and show them my pictures and documentation? Last time I didn't get to speak directly to anyone, only texting online via the app. They just tried the AC 3 times and found it worked each time and declared problem could not be reproduced.

It's intermittent! That's why I'm trying to help by documenting it ahead of time.

Is there anything else I should record to demonstrate the problem and best help them to find the cause?

I was thinking perhaps a second thermometer measuring outlet air temp from the vents.

This may be useful especially since I just discovered today that the updated iPhone app no longer shows red and blue air to indicate heating/cooling respectively. Now it's just plain white. So that info is gone. Glad I got some pics with the old app.
Tesla will assign a charge for the repair when you make the appointment. If Tesla determines that the repair is covered under the warranty then your credit card will not be charged.

At one time a mechanic would take a vehicle home, overnight, if they were unable to reproduce the issue at the service center.

It would be somewhat elaborate but you could set up a GoPro to record the thermometer as you drive. Eventually you would be able to capture the event on video.

[Years ago I drove a Saab 95. When the 95 was new, without any warning or changes made by me, the HVAC would start pumping out full heat to the rear seat vents. I must have taken my Saab 95 vehicle to be serviced four or five times, half a day each time. Usually I would remain in the waiting area while Saab attempted to repair this issue. Eventually the service department was able to identify, replace the faulty components and the problem never recurred after the final repair.]
 

Schulz1983

Model Y LR AWD: Matte PPF, Vossen HF-1
May 14, 2021
599
413
High Ridge MO
P
I do have a second SC appointment pending at a different location for this same issue, but it looks like they want to charge me this time. The app is asking me to accept a 100.00 estimate for labor.

Is it possible to actually talk to the techs and show them my pictures and documentation? Last time I didn't get to speak directly to anyone, only texting online via the app. They just tried the AC 3 times and found it worked each time and declared problem could not be reproduced.

It's intermittent! That's why I'm trying to help by documenting it ahead of time.

Is there anything else I should record to demonstrate the problem and best help them to find the cause?

I was thinking perhaps a second thermometer measuring outlet air temp from the vents.

This may be useful especially since I just discovered today that the updated iPhone app no longer shows red and blue air to indicate heating/cooling respectively. Now it's just plain white. So that info is gone. Glad I got some pics with the old app.
Every time I make an appointment I receive an estimate for repair. I have never paid as it always closes out under warranty. I just accept each time and double check with my advisor at drop off.
 
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Niles

Member
Jul 21, 2021
7
4
Florida
Took my first long road trip today in my new Model Y (July 2021 build) and everything was great except the air conditioning.

It seemed inconsistent. Sometimes plenty cool, even too cold, and then 30 minutes later I find the car is hot and stuffy. When this happens there seems to be low air flow and the supply vent air temp is warmer, then after another 15 mis or so it starts cooling down again. This happened several times over the 250 mile trip. For the most part I just ran the system on Auto with temp set at 72F. I can't understand why there is such a large variation in temperature in the car. Doesn't seem right. Skies were overcast all day so was not related to sun heat load.

I have noticed this once or twice on previous drives as well.

I plan to contact Tesla but was wondering if any others have experienced this.
I live in south east Florida so heat is an issue. I leave the unit on auto at 69. The fan is very loud and air flow changes from warm to cold. Very inconsistent. Trying to hear the radio with the loud fan is a challenge.
 

Pianewman

Active Member
Oct 28, 2020
1,475
1,054
Fort Worth
rjpjnk: For sure, an in-person visit is necessary, and a conversation with a service advisor AND a tech. Have your photos handy.

I've noticed that during "preconditioning" for Supercharging, and during Supercharging, the HVAC gets a bit wonky, starts heating the cabin a bit. I think it's the octovalve getting a bit confused, as it's juggling the various cooling/heating demands. Maybe it can be corrected by a software update, but it could also be a hardware issues. My experience hasn't been as extreme as yours, so no need for any SC involvement.
 
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