cab 33 code

[JEM Xpress]

2012 Cascadia ISX Cummins. Vin BJ1508. Cab 33 code comes up on the display on dash. AC has quit working since. I have read that this is a SAM cab code. Had it to a Cummins shop and he says it is a Freightliner thing. Any suggestions?

[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!

[JEM Xpress]

Have to take glove box out to get to fuses. No biggy. I did check em but i'll do it again. Also checked fuses under hood by the steering column. Will do that again as well. I feel your pain on the dealership. I was at a Freightliner for 5 hrs last week to run a diagnostic to read codes and to replace a fuse. $157.00.

[fargonaz]

I get that code often; same vehicle. My A/C goes out while spending time of city streets, but comes back after 5 or 10 minutes on the road. I'm guessing a pressure switch in the A/C system or the evaporator is freezing. I don't get much time at home but I'll eventually find the culprits.

Good Luck!

[Zusky407]

Also check your fuses in the PNBD it is located under the hood, looks like a fuse box on the firewall near the steering shaft.