What is the reason for the Passat's air conditioning not cooling when the throttle is increased?

1 Answers
OliveFitz
07/30/25 4:03am
Passat's air conditioning not cooling when the throttle is increased is due to excessive refrigerant, causing the high pressure to be too high, which triggers the high-pressure protection switch to trip and stops the cooling. Correct usage method of car air conditioning: Generally, the blue button on the left side of the car represents cold air, while the red one represents warm air, and the middle one represents moderate temperature. To turn on the cold air, adjust the left button towards the blue area. When warm air is needed, adjust it towards the red area, then press the AC switch. Additionally, the middle button controls the fan speed, and the one on the far right adjusts the mode—you can set it to blow air only to the feet, hands, or windshield, or use two modes simultaneously. Precautions for using the air conditioning system for cooling: The air conditioning system requires refrigerant to absorb heat for cooling. Prolonged use can lead to minor refrigerant leakage in the system, or damage to the air conditioning system can cause leaks, resulting in insufficient refrigerant. Both scenarios can cause the air conditioning system to stop cooling. In such cases, it is necessary to check for leaks, evacuate the system, and recharge it.
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