Haas Alarm: 138 A-AXIS MOTOR OVERHEAT – Servo motor overheat. The temperature sensor in the motor indicates over 150° F (65° C). This can be caused by an extended overload of the motor; such as leaving the slide at the stops for several minutes. (Mill) Check parameter 43 bit OVER TEMP NC. Make sure the correct model rotary has been selected in setting 30.