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If fan is turning with no call for ac, we have a voltage bleeding for some reaon.Do you have a volt meter for troubleshooting?
Great.Give me model on outdoor unit so I can guide you in determining where we are getting the voltage to fan
OK I want you to start at contactor with thermostat OFF.
Check both sides of contactor and tell me if we get voltage on both sides
Both sides and thermostat off?
Look closely at the contactor and see if plunger is pulled down,possibly contacts burned together.Then remove one of the smaller wires on side of contactor and see if we still get 240 on both sides.
Both sides of contactor
Next check between the orange C terminal on capacitor to ground lug
OK if fan is turning with no voltage to orange you most likely have a bad fan motor. If you push contactor plunger down will compressor come on?
OK turn thermostat to cool and see if we get 240 between the wires coming off of contactor