cab 33 code

[Waterloo]

Have you checked the fuses? On the ProStar, and I know you have a Freightliner, but there is a 30 amp fuse, or breaker that likes to fail that powers the blower motor. I would not be surprised if it is the same in a Freightliner. Something to check. If there is a breaker, push in type, replace with a standard fuse and give that a shot. Do the same for all AC related fuses in the fuse block. And do not trust that the fuse or breaker is doing it's job. I have pulled perfectly good looking fuses and breakers and replaced with new, and suddenly everything is working. They look good, but are actually not.

I discovered this after getting ripped for $600 at an International dealer. It was not the parts, it was the .10 fuse. Still pissed about that one!