In winter, the car turns on the air conditioner quickly, and the heating doesn't respond. What happened?

1, first check whether the air conditioning filter is dirty or blocked. This is the simplest thing, and many car owners don't care much. Dirty air conditioning filter will really affect the heating and cooling of the warm air, because if it is too dirty, the wind blown out is very small, and you may not notice it.

2, the lack of antifreeze, antifreeze can not only prevent freezing, boiling and rust, but also control the warm air is not hot. Without antifreeze, warm air won't be hot.

3, cooling system problems

Possible problems in the cooling system: First, the thermostat is often turned on or turned on too early, which leads to the large circulation of the cooling system too early, and the external temperature is very low. Especially when the car is driving, the cold air quickly cools the antifreeze, the engine water temperature does not rise, and the warm air does not heat up. Second, the water pump impeller is damaged or lost, so that the flow through the warm air small water tank is insufficient and the heat cannot come up. Third, the engine cooling system has air resistance, which leads to poor circulation of the cooling system, resulting in high water temperature and no warm air. If there is air in the cooling system all the time, it is likely that the cylinder pad is damaged and air leaks into the cooling system. If the inlet pipe of the small heating tank is very hot and the outlet pipe is very cold, this situation should be that the small heating tank is blocked. The small heater water tank should be replaced.