The series LASC-RTD/THM combination liquid level and temperature control board. The liquid level control portion of this board offers microprocessor based auto-sensitivity which eliminates manual means of setting the sensitivity of the control. This patented technology prevents faulty operation of the control relay caused by too high or too low a sensitivity for the liquid being sensed. Using 3 push buttons and the on board digital display, the user can program on/off liquid level control and on/off temperature control with 1 degree resolution.