A hard start kit is a device that is used to help a motor start more easily. It typically consists of a capacitor and a relay, and it is installed in the electrical circuit of the motor. When the motor is starting up, the capacitor stores a small amount of electrical charge and then releases it to the motor, providing it with a “boost” of power. This can help the motor to start more easily, particularly if it is starting under a heavy load. Hard start kits are commonly used with air conditioning compressors and other motors that may have difficulty starting up. They can help to extend the life of the motor and improve the overall efficiency of the system.