A system and control method for an electronic liquid dispenser utilizes a motor to drive a pump mechanism from a home position in a dispense cycle for dispensing a metered dose of liquid from a reservoir. Upon initiation of the dispense cycle, the motor is started to operate the pump mechanism. Motor work performed by the motor during the dispense cycle is calculated as a function of motor current, motor voltage, and run time of the motor. Upon the calculated motor work exceeding a set point value during the dispense cycle, the motor is stopped and reversed to return the pump mechanism to the home position.