S3 Blower Motor Failure: No Air from HVAC System

Having experienced this exact issue on my 2010 Audi A3 2.0 TFSI, I can confirm its likely the fan speed controller module or the blower motor itself failing. When my air circulation stopped completely, the problem turned out to be a burned-out blower motor resistor combined with a failing motor. This is actually a common wear item that controls the air flow through your HVAC system. The fix required replacing both the blower motor and the speed controller unit since they often fail together after extended use. Its a serious issue that affects both heating and cooling performance, but the repair process is straightforward for an experienced technician. The repair took about 2 hours at the shop. The blower motor is located behind the glove box area, and accessing it requires some dashboard disassembly. The good news is that once replaced, the new components typically last for many years with proper maintenance. While waiting for repairs, you wont have any air conditioning or heating functionality, so its best to address this promptly. The error code youre getting is the cars way of protecting the system from potential electrical issues caused by the failing components.

Thanks for the detailed explanation. Your situation sounds identical to what Im dealing with on my S3. The complete loss of air flow and error code matches exactly whats happening. Did you remember roughly how much you paid for the blower motor and controller replacement? Also wondering if you had any electrical wiring issues pop up after the repair was done? Im especially concerned about long-term reliability since my cabin fan is a critical component here and I want to avoid repeat repairs.

Got my S3 back from the shop last week and can confirm the blower motor issue is completely resolved. The repair cost came to 365 Euro which included both parts and labor. The HVAC system is now working perfectly with proper air circulation at all fan speeds. Since the repair, the heater fan has been performing flawlessly with no electrical problems. The blower motor replacement solved all the symptoms, no more error codes and the air conditioning system is back to full functionality. The fan speed controller they installed as part of the fix ensures smooth operation across all settings. From my research and the technicians feedback, these new components should last another 8-10 years under normal use. The modern replacement parts are actually more durable than the originals, so you shouldnt need to worry about repeat repairs anytime soon. While the cost might seem high, having reliable climate control is worth the investment. Plus, leaving a faulty blower motor unrepaired could lead to more expensive HVAC system problems down the line.

Thanks for the advice. Just got back from my trusted mechanic who diagnosed and fixed the issue. Total bill came to 420 Euro for the blower motor, speed controller, and labor. The electrical wiring looked fine according to their inspection. The repair took about 2.5 hours since they had to remove parts of the dashboard to access the blower assembly. The air flow is now perfect, both the heating and air conditioning are working like new. All fan speeds are responding correctly and the error code is gone. What really convinced me to get it done was when they showed me the old blower motor. The bearings were completely shot and there was obvious wear on the speed controller components. Definitely worth fixing before it could cause more extensive damage to the HVAC system. My only regret is not addressing this sooner when the fan first started making noise. But at least now I know what to watch out for in the future regarding air circulation issues.