What is the reason why the Volkswagen AC switch does not light up and does not cool?
2 Answers
If the car's AC light does not light up and the air conditioning does not cool, it is likely due to a blown power fuse of the AC switch or a faulty AC switch, which fails to send a signal to the vehicle's compressor, resulting in no cooling operation. Car AC Switch: The AC button in a car's air conditioning system is the cooling switch, which serves as the power switch for the air conditioning compressor. When the AC button is pressed, the car's air conditioning compressor starts working, and the air blown by the blower becomes cold. Pressing the AC button engages the electromagnetic clutch of the air conditioning compressor, causing the compressor to operate and the car's air conditioning to enter the cooling mode. Solution: You can check the fuse first. If the issue persists, it is best to take the car to a repair shop for inspection and maintenance. For some car models, turning on the air conditioning cooling requires first turning on the blower switch and adjusting the temperature knob to the cooling position before pressing the AC switch for it to light up.
I've encountered the issue of the AC switch not lighting up and the air conditioning not cooling in Volkswagen cars several times myself, and it's quite annoying. There could be several possible reasons: one is a blown fuse, which acts like a small gatekeeper, automatically cutting off the circuit when the current is too high, leaving the AC switch without an electrical signal; another is a faulty relay, which controls the compressor switch—if it malfunctions, the entire system won't work; then there's the wear and tear or poor contact of the button switch itself, where a light press might not elicit any response; also, aging circuits, such as shorted or open wires, can prevent current from passing through; compressor failure is also common, like when the clutch doesn't engage, preventing the refrigerant from circulating. Personally, I've tried checking the fuse box first—Volkswagen cars usually have a fuse box cover under the steering wheel on the driver's side or in the engine compartment—find the AC fuse to see if it's black and broken, and replacing it might restore functionality. This problem occurs more frequently during the hot summer months, so don't delay the inspection; head to the repair shop for a diagnosis as soon as possible.
