THE HARD START CAPACITOR IS USED WHEN THE COMPRESSOR IS LOCKED UP AND CAN POSSIBLY GET THE COMPRESSOR STARTED AND SAVE IT. IT IS ALSO USED TO ASSIST COMPRESSORS IN EXPANSION VALVE SYSTEMS WORKS ON ALL RESIDENTIAL CENTRAL AIR COMPRESSORS IT HAS AN EASY 2 WIRE HOOK-UP, SIMPLY WIRE IT WITH THE COMPRESSOR RUN CAPACITOR (C AND HERM ON THE DUAL CAPACITOR) SOLID STATE RELAY VERSATILE WITH ALL UNITS UP TO 5 TON
