Reducing startup current while providing full start torque, SureStart soft starts single-phase compressors/motors and automatically adjusts to cover 1.75–7 hp range. Housing facilitates installation, and cover allows access to internal wiring lead terminals. Along with terminal block that uses flat-blade screws for lead connection, features include diagnostics; double-insulated, flame-retardant enclosure; and software that enhances starting capabilities in unsteady voltage conditions.