With ventilated seats, if the temperature below 70 degrees, the control defaults to the seat heater option first. When it is 70 degrees or above default to Ventilated seat on/off.
With ventilated seats, currently, the control defaults to ventilation and you must press it 4 times to make it start toggling to heat the seats (with 8.1+ software).
Moderator: Ventated seats were removed in the 2019 time frame, and were added back with the mid-2021 refresh.
Implemented in the mid-2021 Model S/X with “Auto” option to automatically select heat or cooling.