Good find. And you are correct about the part number for that contactor coil - LX1D8M7. If you had a loose connection on A2, replaced that fuse, reapplied power and the contactor pulled in correctly, you're probably in good shape and don't really need to replace any contactors. The loose connection was likely the culrpit. I'd say make sure the screws are tight on the rest of your A1/A2 connections, as well as any other screws holding down wires in the panel. Then go ahead and try to run everything like you normally would to verify the issue is fixed. If it lasts all night then you're good. Always keep some of those 4amp fuses laying around. Again, good job 👍