The A/C compressor clutch cycles rapidly on and off(Heating/Air Conditioning)

Diagnostic Procedure 

Probable cause:

• A/C system is overcharged (Excessive pressure on high side of system causing pressure sensor to turn A/C compressor off)
• Radiator and/or A/C condenser fan inoperative
• Low idle speed

Also Check for 

• HVAC DTCs 
• Faulty A/C pressure sensor