Air Conditioner Problem 3 shops can't find problem so far

If you can get to Texas. I used these guys.

https://www.texastruckac.com/

 

Well, did you get it fixed? And if so, what did they do?

 

I swear I’m going to start up a business converting old Prostars to old-school manual switch AC. There is no ####ing reason for AC to be that complex, nor should it cost thousands of dollars to fix it on a 6 year old truck.

 

If you go over to Rawze.com, Rawze did that to his truck using Adrino switches. He has a ProStar.

What I did, was to dig the Ambient Air Temp Sensor out from under the radiator and moved it up to the windshield wiper cowl. Then I recharged the system using straight refrigerant, no dye. Since doing that, everything works and blows ice cold. I have well over ten thousand dollars in my AC system after four years of it not working, or working sporadically. I did those two things in my driveway, move that sensor and no dye or straight refrigerant in the system. I would like all of that money back, the fix was simple.

 

If you are able to work with digital ohmmeter check all wires in AC system.
Wiring diagram you can download here https://www.google.com/url?sa=t&rct...f/s08339.pdf&usg=AOvVaw1PRMTjh0fg5EPJZRydPifL
Page 213. Most common place wire defects under hood.

 

Your best bet, take it to an International dealer, have them do a simple diagnostic with Diamond Logic. Tell them you want to watch what pops up on the computer. What you are doing now, taking to independent shops is just emptying your wallet. These systems are a PIA, and you know that.

Have the dealer fix what they find, may need a new high pressure switch or something simple, fix it. And then...

The only thing that fixed mine, as I have stated before, is to dig that Ambient Air Temperature Sensor out from under the radiator, in the harness on the driver side. Dig that out, you may have to splice in a few feet of wire, move it up to the windshield wiper cowl and clip it on there. The sensor comes with a clip, imagine that?

Next, evacuate the refrigerant out of the system, install straight refrigerant, NO dye!

Do those things and you should have AC.

 

@Justrucking2 has given you everything you need.

 

Here is the Adrino Fix that your guy wanted $3000 to install. The parts are around $25, the programming is at this link... Prostar ac