Hello. I'm new not only to this site , but to the world of Lincoln as well. Just yesterday bought an 05 Ls. Beautiful car. Very well kept for its age. But it does have a few seemingly minor issues that I'm hoping to get help in resolving here. I found a video on you-tube that showed how to do the A/C self diagnostic. got codes 27 98, 12 65, 12 63. No idea what these mean. Any help would be greatly appreciated.