I have 2012 Pete with isx and fan stay on now before it's take little longer even on manual switch I checked when I turned off engine fan free both sides when u start engine it's making noise as well
Now it's stay on!whats wrong ??
Cummins isx fan stay on
Discussion in 'Peterbilt Forum' started by Hshappy2, May 13, 2017.
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Is your air pressure low? Typically they will run on high gear if you have low air pressure. Also if your A/C is running while your idling they tend to stay on for a long period of time. Thats just the way ISX has it programmed. Ive seen it on every model that has an ISX motor.
Hshappy2 Thanks this. -
There is a switch on the front end of the engine that is air actuated. If it fails fan stays on
Hshappy2 Thanks this. -
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This could be your fan clutch worn out or, as stated, your A/C is turning it on. Sometimes the A/C pressure switches fail or the wiring shorts and causes the fan to run continuously or intermittently.
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I replaced mine, thinking that it was wore out because it wobbles just a little bit. Turns out it's suppose to do that. $440 from the Pete shop. There's a air line off the fire wall above the engine that you could pull off and put some air to it. The fan clutch will pop back and forth if its OK. That's all I learned about it so far.
Hope this helps.Hshappy2 Thanks this. -
Fan clutch was bad so I replaced now working all good it's 550 dollars from peterbuilt dealer in Cali
77fib77 Thanks this. -
Mine was in NYC.
I can't figure labor as I had other things done with the clutch.
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