Audi A4L heating is the first time this year that the air conditioner is turned on, but the heating is very slow. I don’t know what’s going on?
The heating of Audi A4L is turned on for the first time this year, but the heating is very slow due to the following reasons: lack of coolant in the cooling system, clogged heater water tank, thermostat failure, etc., details are as follows
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1. Replace the cooling system for lack of coolant
The coolant is commonly known as antifreeze, and the warm air from car air conditioners comes from this. The principle is different from that of household air conditioners. The automobile warm air circulation is a pipeline connected in parallel to the small engine coolant circulation pipeline. The pipeline is connected to the warm air water tank. The blower blows the warm air water tank to produce warm air. This is how the air conditioner warm air comes. Lack of coolant in the cooling system is the most common and easiest to solve fault that causes the heater to not heat up.
When designing the engine cooling system, engineers will give priority to engine heat dissipation, and then the normal operation of the warm air. When the coolant is insufficient, the coolant will be given priority to circulate in the engine. At this time, there is no "water" in the heater circulation pipe, and most of the heater water tank is air. At this time, the air conditioner heater is naturally not hot.
2. Clean the blockage of the heater water tank
The structure of the heater water tank is actually a reduced version of the engine water tank radiator. Inside are many small heat dissipation pipes and the water tank radiator. It's also easy to get clogged internally. When the inside of the heater water tank is clogged, the coolant flowing through becomes slower, the flow becomes smaller, the heat is insufficient, and the air conditioner warm air is naturally not hot.
Clogging of the heater water tank has no effect on engine heat dissipation (because the two are connected in parallel). The reason for this is that the coolant contains too much scale, impurities, floc, etc. These impurities are caused by not paying attention to maintenance and replacing the coolant with water or other brands of coolant.
In addition, once the heater water tank is found to be clogged, the engine water tank radiator will also be partially clogged (both have the same internal structure and circulate the same coolant). Clean the inside of the heater water tank, the inside of the water tank radiator, and replace all the coolant to completely eliminate the fault.
3. Repair the thermostat
A common fault of the thermostat is that it cannot be opened, but the reason why the heater is not hot due to thermostat failure is that the thermostat is turned off. If not, it is commonly known as the thermostat is always open. After the thermostat is normally open, the coolant circulates widely from the engine idling. If the water temperature is low for a long time in the northern winter, the air conditioning warm air will naturally not be hot. It can also be clearly seen from the water temperature gauge that the needle is significantly lower than the normal scale.
In addition, if the engine water temperature is low for a long time, it will lead to excessive fuel consumption and increased wear (the engine is not working at the optimal temperature). If the water temperature is low for a long time, immediate maintenance and inspection are required.
Extended information:
Use, maintenance and upkeep of air conditioners
Choose the appropriate air conditioner temperature. Of course, in the summer, many people like to keep the temperature very low. As everyone knows, when the temperature is adjusted too low, it will affect your health, so the air conditioner temperature must be adjusted appropriately. The most suitable temperature for the human body is 20°C to 25°C. If it exceeds 28°C, people will feel hot. When the temperature is lower than 14℃, people will feel cold.
Therefore, the air conditioner should control the temperature inside the car between 18°C and 25°C. Too low a temperature can easily make people sick. In summer, the internal circulation is started immediately after entering the car. When the car is parked under the scorching sun for a long time, some car owners like to turn on the air conditioner and start the internal circulation as soon as they start the car, thinking that this can make the temperature inside the car drop faster.
But because the temperature inside the car is higher than the temperature outside the car, this is not effective. When you first enter the car, you should open the windows for ventilation and turn on the external circulation to exhaust the hot air. After the temperature inside the cabin drops, switch to internal circulation.
Baidu Encyclopedia-Car Air Conditioning