What do when your car ac switch was free?(not working and run freely)

My car ac switch is not working they run freely how can i solve it

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Are you trying to say that the switch does not activate the blower motor for the AC? If so, you first need to check for a blown fuse. If the fuse is ok, check to see if you have 12 Volts coming into the AC switch and out to the blower motor, you will need a wiring diagram to identify the wires. That will eliminate two possible causes for the problem, the fuse, and the switch. Beyond that, you will need a service manual for the specific make and model of the vehicle.