Hello! I have a 2006 LR3 HSE. I recently replaced the face and footwell heater blend stepper motor and now nothing works on the HVAC control panel except for fan speed. My iCarsoft tool shows a fault code B1A98-15 "Local interconnection network bus circuit 1" . Seems like something is disconnected somewhere. I checked relevant fuses which are good. Any tips on how to fix this?
HVAC Fault Code
- Thread starter Disco Dave
- Start date
That code refers is caused by the LIN bus having high resistance or possibly shorted to ground. The LIN bus is the 1 wire communication system the HVAC uses to control the blend door motors. The motors know which location they are supposed to be in and will only respond to commands sent to their address. Why did you replace the blend door motor in the first place? Based on the code I would retrace your steps and make sure everything is connected properly and that you didn't accidentally pinch a wire during re-assmbly.