2005 LIncoln LS hot ac HELP

I have a Lincoln 2005 sport it's showing a cold for a mission 1633 what can I do to fix

I have the same problem same car I replaced the resivoir tank 3 times it helped but ac didn't work still just blowing very hot hair out when I drive it on the freeway or highway no ac on but my feet would be burning from the heat that was comming up under the peddles..... But , I have had to change my alternator as well it worked great for a little while but then it started leaking and boiling again . now I have to replace the resivoir tank again .... Ls lincoln v8 2005 needs to be sold to someone else that can put up with it because it is just a commen issue with these cars that will Problie never acctually run great for long periods of time , I think it's the stick & automatic ability to switch over when needed. I don't think the parts that are used to operate this feature without some kind of issue with a part that was used to operate the feature not made of the kind of material or plastic Instead of aluminum everything is made of plastic or cheep rubber that just get way to hot to with stand high temperatures that Lincoln ls v8 runs at.... But im a woman and I wouldn't really know for sure but ive heard of so many of the same issues with my car ....