The correct way to turn on the heater is to start the engine to preheat, and then wait until the engine temperature pointer is in the middle position before turning on the heater. But if the warm air never gets hot, there may be a problem with the car's heating system. However, the system structure of car air heater adjustment is very simple. We can check the reasons from the following aspects.
1. The principle of first simple and then complex, first consider whether the air conditioning filter element has not been replaced for a long time. This is the simplest and most easily overlooked thing, because if the air conditioning filter element is dirty or clogged, The air blown out will be much smaller, which will affect the heating effect of the warm air. 2. Insufficient antifreeze will also affect air heating. This is not only an essential medium for cooling the engine, but also a heat-conducting medium for heating the car. After the antifreeze that absorbs engine heat enters the warm water tank, it will heat the warm water tank. The wind blown out through the hot water tank is hot air. If the antifreeze is insufficient, the amount of air flowing into the small heater box will be reduced, then the heat of the heater box will be insufficient, and the wind blowing will naturally not be hot. Therefore, check the coolant regularly. If you find that the coolant is less than the minimum scale value (the normal capacity of antifreeze coolant should be between the minimum and maximum values), please add it in time. 3. If the warm water tank is clogged, antifreeze cannot enter the warm water tank, or the flow becomes smaller, which will also affect the air conditioning heating. In addition, if this thing breaks down, it will be more troublesome to repair, because you need to dismantle the entire instrument panel to find it. You need to clean the warm water tank and radiator of the water tank, and replace all the coolant to completely solve the problem. 4. Thermostat failure may also affect air conditioning heating regulation. The thermostat is an automatic temperature adjustment tool, similar to the valve of our faucet. The valve changes the circulation range of water, thereby adjusting the heat dissipation capacity of the cooling system and ensuring that the engine operates within a suitable temperature range. If the thermostat fails, the main valve cannot open and the antifreeze cannot dissipate heat through the water tank, which will cause the engine to overheat. On the contrary, if the main valve cannot be closed and is always open, the water tank will continue to dissipate the heat of antifreeze, which will cause the engine water temperature to be low, the heater air temperature not to be hot enough or the heating time to be extended. In addition, if the engine water temperature is low for a long time and does not reach the optimal operating temperature, it will lead to excessive fuel consumption, increased wear and other problems. If the engine water temperature is found to be low for a long time, it should be repaired and inspected as soon as possible.
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