I have found that I can engage my recirc air without a/c... just set the car to recalculation, then turn off the a/c.... if you do it in the reverse order it won't work.... marc '97 A4q Doesn't work on my '98 A4TQ (turn on A/C, turn on Recirc, turn off A/C and the recirc turns off simultaneously). -RDH