Driver Temperature Knob
The left (DRIVER) knobs sets the temperature for the entire system when the right (PASS) knob is in the center or neutral position. Turn the DRIVER knob toward red to the right to raise the temperature. Turn it toward blue to the left to lower the temperature. The display will show your selection for a few seconds, then the outside temperature will show. If you push the knob the set temperature will again be displayed for a few seconds, the outside temperature will show.