TL;DR
Tesla update 2026.32.300, released November 2, 2026, adds an automatic seat heater timeout: a heater may switch itself off after 20 minutes, and you turn it back on from the touchscreen. The release notes list the Model S, Model 3, Model X, Model Y and Cybertruck. As of 1:53 AM ET on November 3, a tracker showed no cars on it yet, so most owners will not see it today.
Why do Tesla seat heaters turn off by themselves? Tesla's Model 3 owner's manual says an individual seat heater "may automatically turn off after approximately 30 minutes of continuous use" to protect vehicle components, and that this is normal. The new 2026.32.300 build puts a number in the release notes: 20 minutes.
What does Tesla update 2026.32.300 add?
These are the changes in the 2026.32.300 release notes as published by Not a Tesla App on November 2, 2026:
- Automatic seat heater timeout (Model S, 3, X, Y, Cybertruck): a seat heater may turn off after 20 minutes. You can turn it on again by hand.
- Grok in more countries (Model S, 3, X, Y, Cybertruck): Israel, the United Arab Emirates, Saudi Arabia, Qatar, Morocco and Jordan are added. Grok works only on AMD-based cars.
- Powershare support check (new Model 3, new Model Y, Cybertruck): go to Controls > Software > Additional Vehicle Information and look for the "Powershare support" field. Tesla only guarantees support on cars built in October 2026 or later.
- Browser ad blocker (Model S, 3, X, Y, Cybertruck): a button at the top of the screen turns it on or off. We covered it in our 2026.32 ad blocker story.
- Cybercab in Supercharger site maps: a charging Cybercab now shows as a Cybercab, not a Model 3.
- Service Mode diagnostic panels for technicians, including a new audio panel and a display diagnostic panel.
The full list of builds is on our Tesla software updates page.
How long until a Tesla seat heater turns off?
Two different figures now exist, and they do not match:
| Source | Time | Wording |
|---|---|---|
| Tesla Model 3 owner's manual | About 30 minutes | "may automatically turn off after approximately 30 minutes of continuous use" |
| 2026.32.300 release notes | 20 minutes | "may automatically turn off seat heater after a 20 minute timeout" |
Not a Tesla App first spotted the timeout on September 15, 2026, in the manual wording above, as the 2026.32.3 build reached cars. It reported the 30-minute figure then. Tesla has not said why the release notes now say 20. The word "may" appears in both, so the heater is not promised to shut off at an exact minute.
The notes say the timeout exists to preserve the life of the heating elements, and that it also helps when someone forgets a heater is on.
Which Teslas get the seat heater timeout, and when?
The release notes list the Model S, Model 3, Model X, Model Y and Cybertruck for this change. They do not say which hardware, trims or regions come first. Tesla sends updates out in waves, and the tracker at Not a Tesla App showed 0 cars and 0% of the fleet on 2026.32.300 at 1:53 AM ET on November 3, 2026. Not a Tesla App reported the timeout on cars that got the earlier 2026.32.3 build. To see which version your car runs, check Controls > Software.
How do you turn a Tesla seat heater back on?
Tesla's manual says to adjust the seat heater setting on the touchscreen. Not a Tesla App adds that the heating icon in the bottom climate bar works, and that you can start seat heating from the Tesla app too. If a heater keeps turning off again and again, or will not turn on at all, the manual says to schedule service.
For more cold-weather help, read how to prepare your Tesla for winter range loss.
