Why is the Audi A6 air conditioning blower not working?
3 Answers
Audi A6 air conditioning blower not working may be due to wiring switch or control issues. Introduction to the air conditioning blower: The air conditioning blower control unit acts as a power amplifier, controlling the voltage across the blower V2 based on the wind speed demand signal from the air conditioning control unit E87. During low-speed operation of the blower, the control unit has a higher voltage division and generates more heat. For heat dissipation, the control unit is installed in the air duct behind the blower. Fuse blown: The blower is directly powered by fuse S225, and the blower control unit J126 controls its grounding voltage, thereby regulating the voltage applied to the blower V2. When inspecting fuse S225 in the driver's side fuse box, it was found to be blown. After replacing the fuse, the blower operates normally and no longer blows the fuse.
Having driven an Audi A6 for several years, I've encountered issues with the blower motor not working. The most common problem is a blown fuse, which can be easily checked in the fuse box under the driver's seat—if it's melted, no current reaches the blower. Another frequent issue is a faulty relay; that small component in the engine compartment controls the circuit's on/off function and can fail due to aging. The motor itself might also wear out and seize, or there could be poor wiring connections leading to a short circuit. In my case, the fan kept making noise but eventually stopped—turns out the motor bearings were rusted solid. I recommend regularly cleaning the AC system to prevent dust from clogging the vents, which can hinder cooling and accelerate part wear. If the problem persists, it's best to visit a professional shop for a diagnostic scan to read the fault codes—don't delay, as driving in summer without AC is unbearable.
It's quite frustrating when the air conditioner stops blowing air. For an Audi A6, there are several potential issues with the blower motor that come to mind. A blown fuse is a common culprit—if the corresponding one in the box is burnt out, it needs replacement. Loose or aged wiring can also disrupt power supply; try unplugging and reconnecting to check for secure connections. Additionally, a faulty relay may fail to control the circuit, or the blower motor itself could be defective. When inspecting yourself, be cautious to avoid electric shock—safety first. If unsure, don’t attempt repairs. A non-functional AC affects cabin air quality; use the recirculation mode as a temporary fix or pull over to inspect. Ignoring it long-term may lead to system overheating and shorten the AC's lifespan, so it’s best to visit a repair shop for a thorough fix.
