The temperature of the car's water tank won't go up. There's no hot air. Why?

The engine temperature does not come up or the heating rate is very slow, and the warm air is not hot. Most of them will show that the water temperature rises when there is traffic jam or red light, and the temperature drops rapidly when the car is driving. The main reason for this situation is the failure of the thermostat, which always keeps a large circulation state and is improved immediately after replacing the thermostat.

Extended data:

Pay attention to the warm air is not hot:

1, the refrigeration system is short of cooling liquid, so the car air conditioning warm air comes from it, and the principle is different from that of domestic air conditioning heating. Automobile warm air circulation is to connect a pipeline in parallel in the small circulation pipeline of engine coolant, which is connected with a warm air water tank, and the blower blows the warm air water tank to generate warm air, which is how the air conditioning warm air comes from. The lack of coolant in the cooling system is the most common and easily solved fault phenomenon that causes the warm air not to be hot.

2. The heater tank is blocked. The structure of the warm air water tank is actually a miniature version of the radiator of the engine water tank. There are many small cooling pipes in it, which are as easy to block as the radiator of the water tank. After the inside of the warm air water tank is blocked, the coolant flows slowly, the flow rate becomes smaller, and the heat is insufficient, so the air conditioner warm air is naturally not hot.

3, thermostat failure, the common failure of the thermostat is that it can't be opened, and the reason why the warm air is not hot due to the thermostat failure is that the thermostat can't be closed, commonly known as the thermostat is always open. After the thermostat is normally open, the coolant begins to circulate from the idle speed of the engine. If the water temperature is low for a long time in winter in the north, the air conditioning warm air is naturally not hot. It is obvious from the thermometer that the pointer is obviously lower than the normal scale.

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