air conditioner start capacitor is an electrical part that is used in the circuits of gas and water coolers. This capacitor is required to provide the necessary energy to start single-phase induction motors. The start capacitor is activated only when the engine is started and then it is removed from the circuit. The start capacitor creates a phase difference between the main and auxiliary windings of the motor and increases the starting torque of the motor. The starting capacitor usually has a high capacity and voltage and is made dry or oil.