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What is the make and model of your A/C and thermostat?
Coleman thermostat? Digital or analog?
Do you still have a display showing or is it dark?
Take the cover off and check the fuse. It may be blown or the main fuse may be in the load center where the fuse is bad. It might be marked furnce.
Great! We would have gotten to this but you beat me to it. Good job!