HVAC (2 OF 6)
I found this member’s thread very useful when doing this work. - - - - > 67ChevyRedneck, Rebuild you A/C controller
http://67-72chevytrucks.com/vboard/s...d.php?t=245558
CU removed……...............................………......................……….Broken lever
Broken lever removed…….......................................................Back together again
PROBLEM 3: One illumination lamp in the CU is burned out.
SOLUTION: I installed two new 1895 lamps.
PROBLEM 4: The diverter box outlets door is broken at the hinge.
SOLUTION: Over time, the plastic will fatigue and break near the hinge rod and the door becomes mechanically disconnected from the rod. The door usually ends up being stuck in the down position so that air is always diverted into the AC ducts and never to the heater ducts (which is how I discovered the problem).
There are many threads posted in here that discuss this issue and offer repair advice. I figured I’d try to make the repair since no one sells just the door and the whole box runs $90 or so.