Answer: None of the advocates of the theory of anthropogenic global warming claim that CO2 is the only factor controlling temperature in the ocean - atmosphere climate system. (grist.org)
Auto climate control systems vary in design and can get complicated but they all have mechanical provision for controlling temperature by mixing fresh / cold / hot air. (mechanics.stackexchange.com)
We especially like the detailing in how the climate control temperature displays roll the digits up and down much like a mechanical system from the past did. (theintelligentdriver.com)