In the scorching summer sun, car air conditioners play a vital role in the hot summer. However, with the increase in the number of uses, various problems will inevitably arise in the air conditioner. Then, when the car air conditioner is not refrigerated, it will undoubtedly bring great discomfort and trouble to the driver. This article will take a deep dive into this problem, analyze the common causes that may cause the car air conditioner to not refrigerate, and provide corresponding solutions.
1. Insufficient refrigerant or leakage.
Automotive air conditioning systems rely primarily on refrigerants (e.g., R134A) to achieve refrigeration. If the amount of refrigerant is insufficient, or if the ducts deteriorate due to long-term use, the cooling efficiency of the air-conditioning system will be seriously affected. The judgment method is to detect the refrigerant pressure through a professional instrument, if the pressure is found to be lower than the normal value, there may be a problem of insufficient refrigerant or leakage. The way to deal with it is to find a professional car repair service station to refill or to find and repair the leak.
Second, the compressor failure.
The automotive air conditioning compressor is the core component of the entire refrigeration cycle, which is responsible for driving the refrigerant to circulate in the system and bring it to high pressure and high temperature. When a compressor fails, such as a damaged motor, severe internal wear or a malfunction of the electromagnetic clutch, the air conditioner cannot be effectively cooled. For such failures, it is often necessary to replace the compressor with a new compressor or associated damaged components.
3. The condenser is clogged or the heat dissipation is poor.
The condenser is located at the front of the vehicle, and its function is to convert the compressed high-temperature and high-pressure gas refrigerant into a liquid state and release heat. If a large amount of dust, leaves and other debris are attached to the surface of the condenser, or the cooling fan works abnormally, the condensing efficiency will be affected, resulting in the weakening of the cooling effect of the air conditioner. Regular cleaning of the condenser and checking the working condition of the fan can effectively prevent such problems from occurring.
Fourth, the expansion valve or evaporator failure.
The expansion valve is responsible for regulating the flow of refrigerant into the evaporator, which uses the refrigerant at low temperature and low pressure to absorb the heat in the vehicle for refrigeration purposes. Problems with any of the two components, such as blockage, damage or improper adjustment, will cause the refrigerant to not absorb heat effectively and evaporate, which will affect the refrigeration effect. In this case, it is necessary to have a professional overhaul and replace the relevant parts if necessary.
5. Circuit and control system problems.
The operation of the automotive air conditioning system is inseparable from the precise control of the electronic control unit, including the power supply**, sensor signal feedback and actuator action response. When there are problems such as short circuits, open circuits, or component failures in these circuit parts, it may prevent the air conditioner from turning on or operating properly. In this case, it is necessary to use a diagnostic device to read the fault** and troubleshoot and repair it according to the fault code guidelines.
To sum up, the non-refrigeration of automobile air conditioners is a phenomenon intertwined with multiple factors, involving multiple levels such as refrigerant, mechanical structure, heat dissipation system and electronic control. When encountering such problems, it is recommended to go to a professional auto repair service center for comprehensive inspection and maintenance in time, and do not operate blindly by yourself to avoid greater losses. At the same time, pay attention to regular cleaning and inspection of all components of the air-conditioning system in daily maintenance, and maintain good usage habits, which can effectively prevent and reduce the occurrence of air-conditioning non-refrigeration.