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. 0:00 / 7:50 How to fix Audi A6 Climate Control (HVAC, Heater unit). WheelsAndMotors 40.5K subscribers Subscribe Subscribed Share 314K views 10 years ago Attention! Another way of cleaning it - 01273- Fresh Air Blower (V2) 02023- Supply Voltage for control. module for fresh air blower lower limit exceeded. 01844- control module for fresh air blower J126. i did search a lot of posts about this issue and the common faults of these codes are caused by faulty fan motor and blower resistor. 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. Jul 30, 2021. #2. christopher barnes said: Hi guys, noticed my heater blower wasnt working, all direction and heat ok. No a/c. I tested the fan using a 12v supply which was fine so i then lazily ordered the heater resistor thinking that this was the fault. yTMIx.

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