What is the reason why the hacker's warm air slot is broken?

The reasons why the hacker's warm air slot is broken are: aging of parts; The water tank is blocked; The cooling system pressure is too high; The thermostat doesn't work; There is air in the cooling system. Take Hacker 2022 2.0LCVTXV Zhixiang Edition as an example. Its body structure is a 5-door 5-seat SUV. Body dimensions are: length 440 1mm, width 1837mm, height 1593mm, wheelbase 2646mm and fuel tank volume 57l. Hacker 2022 2.0LCVTXV Smart Edition is equipped with a 2.0L naturally aspirated engine. Maximum horsepower 15 1ps, maximum power11kw and maximum torque 194nm. Matching it is a 7-speed continuously variable gearbox, and its front suspension type is Mai. Million car purchase subsidy