A6 Quattro Wagon V6-3.2L (BKH) (2006)
Heater Control Valve: All Technical Service Bulletins
A/C - L/H To R/H Vent Temperature Difference
80 Temperature different between front driver and passenger sides
80 10 01
2013883/6
October 15, 2010
Supersedes Technical Service Bulletin Group 80 number 08-05 dated December 5, 2008 for reasons listed below.
AFFECTED VEHICLES
CONDITION
^ With the same temperature settings, different temperature air comes from the outlet vents on the driver side and passenger side. The outside outlet
vents release warm air, and the inside outlet vents release cool air.
^ Insufficient cooling from climate system.
TECHNICAL BACKGROUND
^ Debris remaining inside the engine block during production blocks the pump valve unit. As a result, one valve can stay permanently open, allowing
warm coolant to flow into one of the heat exchangers.
^ Electrical connector not seated completely or pin is pressed out.
^ Outside temperature sensor G17 shows incorrect value.
^ Pump valve unit is faulty.
PRODUCTION SOLUTION
^ The engine blocks are cleaned of debris in a high pressure washing system.
^ Extensive checks at the supplier.
^ Outside temperature sensor improved. Improved sensors have a green, yellow or blue dot.
^ Improved pump valve unit.
SERVICE
1. Turn both sides on Low. If the temperatures on the driver and passenger side do not clearly drop to a reasonably equal temperature (one side is
warmer than the other), a valve in the pump valve unit is blocked. Replace the pump valve unit.