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Hello my name is ***** ***** I'm here to help you out! Your first co. Unit has a low temp cut out switch mounted on the cooling cool, so if the blower is not working the cooling will not continue to run and freeze the coil up. Once the coil temperature rises the unit will turn on again until the low temp switch shuts it off again... This is consistent with what would happen if the blower motor isn't running. Did you put the motor in yourself or did someone else?