If you are referring to the fan motor could be a bad capacitor on the unit... alot of outside units have a whats called dual capacitors which half work the fan motor and the other side will work the compressor... will need a tester that checks microfarads. if that checks out good then make sure you are getting power out of the board on the d.e.f. terminal of the board if so then you have a bad fan motor ...
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If you are referring to the fan motor could be a bad capacitor on the unit... alot of outside units have a whats called dual capacitors which half work the fan motor and the other side will work the compressor... will need a tester that checks microfarads. if that checks out good then make sure you are getting power out of the board on the d.e.f. terminal of the board if so then you have a bad fan motor ...