Why is the Volkswagen Tiguan's air conditioning not cooling?

1 Answers
LaRosalie
07/30/25 10:41am
Volkswagen Tiguan's air conditioning not cooling reasons are as follows: 1. Too much or too little refrigerant: Excessive refrigerant is usually caused by overfilling during maintenance, as the proportion of refrigerant in the air conditioning system has specific requirements. If the proportion is too high, it can affect heat dissipation, meaning more heat dissipation leads to greater cooling capacity. Insufficient refrigerant is due to minor leaks in the system. If there is not enough refrigerant in the air conditioning system, the amount of refrigerant sprayed into the evaporator from the expansion valve will decrease, and the heat absorbed during evaporation in the evaporator will also decrease, resulting in reduced cooling capacity. 2. Unclean cooling system: The radiator and condenser are crucial cooling devices in the vehicle. If they are too dirty, heat dissipation will be poor, not only causing engine overheating but also directly affecting the air conditioning's cooling performance. Therefore, if the air conditioning performance is unsatisfactory during hot weather, the first consideration should be whether the vehicle's cooling system has been cleaned. 3. Air in the system: If air enters the air conditioning system, it will cause excessive pressure in the refrigerant lines and poor refrigerant circulation, leading to insufficient cooling. Such faults are mainly caused by degraded sealing of the refrigeration system or incomplete vacuuming during maintenance. 4. Blower fan malfunction or damage: The blower fan is the power source for air conditioning airflow. If it malfunctions, the air conditioning will not blow air. To check if the blower fan is damaged, turn on the air conditioning at a high fan speed and listen to the location of the blower fan in the vehicle to see if it is working or if there is any obstruction causing unusual sounds.
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