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2017 75D A/C issue in AZ Summer.

Brady M

May 1, 2019
Made a service appointment a few months back for an A/C problem that I've been having. The A/C will randomly start blowing warm air for 5-10 minutes, then eventually will start to blow cold. Tesla service ran their A/C diagnostic test and said everything checked out okay. So I picked the car up.

A few days later same thing started happening, I started sending bug reports in with the voice command every time the air blows warm. Basically I know something is wrong and deal with the air blowing hot for a few minutes. Yesterday when I left work, the A/C was blowing hot air the entire 30 minute commute home. Let the car sit in the garage a few hours and went back out and turned on the A/C, still was hot. Made a service appointment (again), and the first available date is a month out. Driving a month is the hottest part of Arizona summer sounds terrible.

This morning I thought it was going to be a hot drive to work, turned on the A/C and the damn thing is blowing cold again WTF? Anyone have a similar issue? Sorry for the long post.


Active Member
Jan 6, 2020
FYI. There is no "sending" with bug reports. When you record a bug report, it simply places a marker(s) in the log file of the computer on the car. Makes it easier for the technicians to go to the specific area within the log for the timeframe you reported the issue. Nothing actually gets uploaded from car to tesla when you submit a bug report


Well-Known Member
Mar 10, 2016
My car does this occasionally when it's very hot here in the central CA interior (2016 S75). I usually get a warning message on the center screen saying "AC temporarily reduced, vehicle systems being cooled". A few minutes later it blows cold again.

When is the last time you had your AC serviced / desiccant bag replaced? Been a few years for me. Was thinking of taking the car in to have that done as a maintenance task and potential resolution.

Brady M

May 1, 2019
Update... Tesla found that the A/C compressor would turn off when the Air suspension compressor turned on. They added or replaced electrical harness overlay, Part ASY,HRN,MDLS,LHD, JUMPER(1457501-00-A).

Took Tesla service several appointments to diagnose properly. Just FYI if anyone has the same issue.


May 23, 2015
Scottsdale, AZ
Also in Arizona. Have two model s’ s. On very hot days this can happen. Blowing warm air for only a minute or two. Both cars have experience this. I assume it’s iced up and melting the ice off the condenser. Cold air returns. Not sure that’s what happening but a minor problem. Usually occurs on longer drives.

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