Audi A6 - (Yauhen_D / Shutterstock) The most common causes for Audi A6 AC not blowing hard enough are clogged cabin air filter, dirty evaporator coil, and frozen evaporator coil due to low refrigerant. Less common causes are dirty or sluggish blower motor and faulty mode door actuator. The most common causes for AC fan blower motor not working in Audi A6 are blown fuse, bad relay, resistor or control module malfunction and faulty blower motor. However, a bad electrical connector or broken wire, or a defect in the climate control unit can also cause the blower motor to stop working. 1. Blown fuse Audi A6 models built from 2005 to 2007 have be known for having an issue with its pump valve unit; in fact, a TSB ( 2013833/5) was issued, recommending replacement of the old unit with a newly updated model. The problem occurs when the pump valve becomes blocked with engine debris. If the interior blower fails on the vehicles mentioned above, the cause may be a faulty pressure sensor in the air-conditioning system. The blower output stage and the pressure sensor (see figure) use a shared signal line to communicate with the control units (Climatronic). The most common causes for blower motor not working in Audi A6 are blown fuse, bad relay, resistor or control module malfunction, and faulty blower motor. However, a bad electrical connector or broken wire, or a defect in the climate control unit can also cause the blower motor to stop working. I scanned with vcds it shows this fault code: 02071 - Local Databus. 012 - Electrical Fault in Circuit. Freeze Frame: Fault Status: 01101100. Fault Priority: 3. Fault Frequency: 1. I checked all fuses and wires,also replaced the blower and module still the same. I guess it can be a Climatronic fault. 02071 Audi A6 with no heater blower. I walk through my diagnostic thought process on this A6 logging 02071 communication fault with no heater blower more. HOW TO FIX COOLANT SYSTEM FAULT/NO AC /FAN NOT WORKING/AUDI A6 Hey guys, in this video I demonstrated HOW TO FIX COOLANT SYSTEM FAULT,NO AC ,FAN NOT WORKING, on 2012 AUDI A6 Read out the error memory. Check the parameter for the pressure sensor via the measured value blocks (the parameter should be around 5 bar when the air-conditioning system is filled and switched off) Check the control of the sensor and fan as necessary. A6 / S6 (C6 Platform) Discussion - AC blower not working (Special Situation) - One day my 07 2.8 (without solar roof) AC blower not working and the following codes found by VCDS: 01273- Fresh Air Blower (V2) 02023- Supply Voltage for control module for fresh air blower lower limit exceeded 01844- control module for 514p.

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