2006 Dodge 2500 Diesel 5.9 4x4 Mega cab. Has AC outlet for back seat.
The final failure, Blower motor will not turn on.. This begin with AC unit, air blow slowing down to nothing after about 1.5 hours of use. AC head unit replaced (switch panel), Large fuse down by blower motor replaced. Did not change the problem. I could turn unit off, leave off for 3 minutes it would come back on full force for a bit longer. This continued to dwindle down and final would not come on at all. Checked all fuses I could find (under Hood) (there is 12.0v) at Blower motor. Removed motor run on DC Power Supply runs great. When the unit was in the truck you could hear a noise in the area of Blower motor like running out of sync. I used it most of the summer by turning off and back on after a short delay.

I believe if I had a schematic of the AC/Heater circuit, I could trouble shoot now that nothing works. I await suggestions or answers.