Using the latest VCDS with a proper lead, not an ebay lead. Aux heater has stopped firing up, wierd! Pipes in and out of heater are luke warm, so im assuming thats the warmth comming from the front heater matrix. If the aux unit isnt working then the flaps / motor wont be working either. I took the wiring plug appart earlier, was all manky, sprayed with contact cleaner, reset errors and still the same. What temperature does the aux heater start working at?