HVAC Coding and Adaptation B6 A4

Hello,

Does the order matter when both coding and Vehicle Data Learning a HVAC control unit is required?

I've installed a used Climate Control unit in the dash. This fixed my AC except the rear window defroster no longer works. A VCDS-Lite scan shows Incorrect VIN and no comms to Converable Top in the HVAC module.

I've located the fix, I think, in the VCDS WIKI:


So I need to correct the coding and "teach" the car's VIN to the HVAC unit, or is it the other way around?

Thanks

I would try to correct the coding first.

-Uwe-

Thanks Uwe. That worked.