IndigoBlueWagon
TDIClub Enthusiast, Principal IDParts, Vendor , w/
Mine comes on shortly after starting the car. I get heat less than a half mile from my house. And I think the aux heater continues to run until the car is up to operating temperature. I rarely run the fan about second speed so it doesn't seem to require full fan speed to activate. Easy to tell when it's on: Idle speed bumps up to 1000 RPM.