A/C module may need calibration, relay may be out, or climate related fuse may be blown. Check fuse first, it's easiest and simplest.
Then:
Calibration/Diagnostics Test Entry
Takes about 2 minutes to run, engine must be up to temperature (radiator fan should have kkcked on at least once)
TO INITIATE TESTS:
A/c control module or a/c relay fuse.
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Usually answered in minutes!
after changing the battery the console lights flash
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