I have similar problem with 11th generation hybrid sport trim in Romania, Europe. I get the car in 2024 June. When the winter comes, I can feel that: after start the ventilation system works normally but after 20-30 minutes was start to introduce cold air inside. I get the car to dealer for check and he installed 2 sensors inside the car. One next to central 2 vents and another one next to cups holder. Here is start the measurement with ventilation settings auto 23C. After 30 minutes the ventilation starts to introduce cold air and 1st sensor indicates 21C next to vents and the second one 26C next to cups holder. So was clear that system let temperature increase up to 26C and after that consider to cool down inside temperature and start vents 21C (in the same time the vents for rear seats are introducing hot air). I claim that is the issue, temperature was increased to 26C uncontrolled and system decided to cool the air because is to warm inside, dealer claimed that is not a defect but something normal. I’m an engineer and I know that any climate control system have in menus an option for temperature gradient option 1C, 2C and so on. Dealer told that option doesn’t exist and the problem cannot be considered a defect as everything works fine. What should I do, to write Honda owner, to go with car in front of his factory and ask the for a Honda engineer? Did anyone find gradient setup in the menu or the position of air temperature sensor inside?