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Air conditioning reduced - DC Fast Charging / Supercharging rate may be reduced


New Member
Sep 9, 2021
I know there are a few threads on this already, but they looked to be older and perhaps not as much information was known as now?

I just had this happen to me over Labor Day weekend coming back to Colorado from a trip to Nebraska. It was a hot day ~95 F, but I have just moved here from Arizona, and it wasn't AZ hot! I stopped to supercharge 3 times, and it was after the last supercharging session of only about 15 mins, that I got the AC reduced. Also, it was not reduced, it was totally shut off. There was no cool air whatsoever! It reminded me of a windy day in AZ. :) Luckily we were just about home after that last charge, so I only had to put up with no AC for about 45 mins. It would have sucked if this happened after the first charge. I got home around 5pm, parked in the garage and the fan continued to run until the time I went to bet around 10 pm, and both side louvres were closed the entire time. By this time, it had cooled off into the low 70's, so I parked it outside and by the time I got up in the morning, fan had finally stopped running and it seemed back to normal.

I took it into the service center today, and the story I am getting back is everything is working within tolerance levels. They said the car will protect the battery at all costs, so it is normal not to have any AC in the cabin as it redirects the air to the battery. He also said that is the reason the side louvres were shut, is to keep the cool air inside the battery. This did not make sense to me since I figured the reason the louvers opened was to get air from the outside flowing over the battery. But he said there is also a louver in the middle part of the bumper to get fresh air which I guess is hard to see.

Anyway, I just wanted to make sure this is the same story everyone else is getting. My 4-year warranty expires in March, and there will not be a lot of hot days between now and then to have this happen again. If there is something that needs to be fixed, I want to know about it now, before warranty runs out! It doesn't make sense to me why this never happened in AZ when it was much hotter, unless there was a software update that changed to this behavior, due to the battery catching fire issues. One thing for sure is driving on a hot day with no AC is not something I expect when I buy a $100k car!

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