03 international 8600 ac fan/ clogged pipe cant get code to…

What is the high side pressure climbing up too ? Do you have gauges hooked up to it ? I am curious as to how high it is going in pressure ?

I think the fault needs to be cleared to retry . Here is a diagram of fan wiring .

Is the fan coming on more often when the ac is running ? It should be ... It goes by how high the high side pressure is going ...

If you have fan override switch , have you tried leaving it on to see if it cools ?

There should only be 1.875 lbs in the system . That is all that system takes .

How are you trying to clear it? And do you have DLB ? The software for the body controller ?

Ok ... can you tell me what the ac pressure is reading ? Through DLB ?

You simply go to the small funnel looking icon next to the feature tab and click on it ... then search for hvac

Then highlight the HVAC feature that has a checkmark next to it and click on make session .

Did you find it okay ?

Did you find the funnel icon ?

No ... Go to the "Features" tab . Click on it

Once there , go down a little and look all the way to the left . You will see another "feature" tab .... right next to it , there is a little funnel . Click on it ...

Once you click on this funnel button , a window will pop up . Type HVAC in the search box and hit enter .

You should see a bunch of different hvac features come up . We need to highlight the one that is currently installed on the body controller . You can tell this by looking for the one with the checkmark .

Once that one is highlighted , click on the "make session" button

how's it going

So let me get this straight ... if fan is on override and running all the time , the ac is fine ? It's blowing cold inside ?

Is it possible that someone may have connected to ecm lately and might have changed settings in there at all ?

I sent wiring diagram awhile ago ... It shows pin 11

Ecm needs to be set to listen for the message from the body controller to turn the fan on when the ac high side pressure is high and the body controller requests the fan on .

I am not either when it comes to cat ET but there should be a setting in the features and parameters area that you can enable under fan settings so that it recognizes the message to enable fan when needed and there is also a setting for how long to let fan run when it sees the message ... normally you would set it for 30 seconds each time it gets the signal to engage fan .

That sounds about right . Let's try it !

Is there also a setting for how long fan will stay on ? If so , you should set to about 30 seconds ...

So basically , when AC reaches 285 psi , the message will be sent , the fan will come on and should stay on for 30 seconds whenever that message is sent . Then it will come off until the next time the pressure reaches 285

Any other spot that mentions AC?

Does the fan ever come off ? for anything ? It is possible that the solenoid was replaced and has the wrong one in it ? Normally open versus normally closed ?

Would doing this over a phone conversation maybe help out further ?

It might be quicker to get through that way ...