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What is your question?
Sign on dash says check air conditioning connection. Battery dead for a few months
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Hello, Vehicles sitting long periods, unless stored climate controlled and sealed off from the world (who does this?) is synonymous with electrical damage because of .... rodents. Look in and around for mouse droppings. If you find some, they have likely chewed wires. If you don't find any, the issue may be a bad fuse. Otherwise, it is not likely that electronic components failed due to sitting without power, so you may need to visit the dealer to re-flash software for the HVAC control module or the vehicles network (CAN)