Low freon
On the the climate control panel there is are 3 buttons, one says econ, the next looks like your windshield and the next one is square, this is the rear window defrost.
The Buick Roadmaster was not produced in 1986. They were made from 1991 to 1996.
is it manual or digital, get back at me
no there is not
Fix wind star climate control switch
It is not equipped with an inertia switch.
It is on if you selected it by pushing the button.
Fix wind star climate control switch
replace climate control switch, the hole unit on rockauto.com
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.
Mode switch is for the climate control. It allows you to direct the airflow from your feet, to the dash vents, defrost etc.