What is the reason for the malfunction of the Audi A6L air conditioning AC button?

[VanNova]

The reason for the malfunction of the Audi A6L air conditioning AC button may be poor contact in the power supply and ground wires of the control panel. Controller failure: Check whether the motor nuts are tightened, whether the electricity is too much or too little, and whether the tire pressure is sufficient. If you have tools, you can open the seat bucket to check whether the battery cables are about to break, whether the screws are loose, and also check whether the thick wires of the controller are burnt or loose. If it's not a problem with the controller or motor, it's usually an issue here. Insufficient power: Check whether the battery has low power, poor contact, damage, loose battery socket, or aging and poor connection of the ignition lock wires. This fault may also be caused by the controller, but there's no need to rush to replace it. In addition to the power supply part, other external circuits should also be checked.