Customer reported fan motor does not shut off. Scheduled next day appointment. Upon arrival found condenser fan motor continuously running without call to operate. After troubleshooting found that motor was incorrectly wired. Corrected wiring. Motor now cycles with compressor as it should. Once system was running checked refrigerant levels which were found to be low. Found Schrader valve on discharge line had large amount of oil and valve cap had no o-ring. Tightened valve system slightly as it had been over tightened in the past and could not be removed and replaced. Installed two new valve stem caps with new o-rings.