It is on if you selected it by pushing the button.
is it manual or digital, get back at me
no there is not
Fix wind star climate control switch
First of all, are the dash lights also out......if so, the rheostat behind the instrument cluster may be the cause........
PULL the light switch out (must be in lowbeam setting for fog lights to work)
Fix wind star climate control switch
replace climate control switch, the hole unit on rockauto.com
Low freon
If the climate control on a 2003 Trailblazer will not switch from feet to head vents, try changing it to defroster then back to head. The mode button on the dual climate control model can only be switched from face/feet to feet and then to defrost. The feet and head vents worked at the same time.
On my 2002 X-Type I PUSH the fan knob/rheostat. This cycles the climate control/AC on and off. Hope this helps a bit.
That is the dash light dimmer control switch.. Rheostat = Dimmer. Bright to dim.
Mode switch is for the climate control. It allows you to direct the airflow from your feet, to the dash vents, defrost etc.