What is the problem with the icing of the Volkswagen Lavida air conditioning pipe?
2 Answers
Reasons for the icing of car air conditioning pipes: blockage of the air conditioning drain hole, high moisture content in the refrigerant of the air conditioning system, failure of the evaporator temperature sensor, blockage of the expansion valve, etc. Icing of car air conditioning pipes will affect the cooling of the car air conditioning and should be checked and repaired at a maintenance shop in time. More details are as follows: 1. Reason: The refrigerant has become very cold after passing through the expansion valve, and then the cold refrigerant flows to the evaporator. In front of the evaporator, there is a blower specifically designed to draw in fresh air from outside the car and blow it toward the cold evaporator. The temperature of the ambient air drops sharply after passing through the evaporator, turning into the cold air that is blown out. 2. Result: The high-pressure pipe of the air conditioning is cold or even frozen, which is likely caused by the compressor not working properly or pressure leakage midway, preventing the refrigerant from receiving sufficient pressure to lower the temperature, thereby disrupting the entire air conditioning cooling cycle and rendering the air conditioning unusable.
I've been driving a Volkswagen Lavida, and the issue of air conditioning pipes freezing is quite common. There are many reasons for this, such as overcharging the refrigerant, which can cause a sudden pressure increase and result in the pipes frosting over. Conversely, too little refrigerant can also cause problems, as the system won't operate properly, leading to excessively low temperatures at the evaporator and subsequent icing. Additionally, if the expansion valve gets stuck or damaged, it disrupts the regulation of refrigerant flow, making the pipes prone to freezing. A clogged air filter is even more troublesome, as it restricts airflow and reduces the efficiency of cold air circulation, causing the evaporator surface to become extremely cold. I recommend first checking if the air conditioning filter is dirty and needs cleaning or replacement—don't underestimate this, as a dirty filter can worsen airflow and exacerbate icing. If the filter is fine, it's best to visit a professional shop to test the refrigerant level, as both too much and too little can be problematic. Pay attention to your air conditioning settings while driving—avoid blasting the AC at maximum power right after starting the car, as the system is unstable during a cold start and prone to issues. This is especially important in winter; after starting the car, let the AC run for a few minutes before cranking up the fan speed. Regular maintenance is key—generally, inspect the air conditioning system once a year to avoid on-road troubles that could affect comfort and fuel efficiency.
