AC electric fan not turing on
06-24-2010, 09:23 AM
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Model: Cherokee
AC electric fan not turing on
I just had my compressor and dryer replaced. The AC works fine but the electric fan will not kick on. All the fuses are good. Ran a wire to the fan direct and it turns on. Where do I look next? Thanks...
06-24-2010, 02:03 PM
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Year: 2001
Model: Cherokee
Engine: 4.0L I6
it doesn't come on with the AC, or it doesn't come on at all? If it comes on w/ the AC but not when the engine starts to run hot, check the coolant temperature sensor too.
06-24-2010, 02:42 PM
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Year: 1998
Model: Cherokee
Engine: 4.0L HO
What year model?????? '00 & '01 efans only come on when coolant reaches 218F.......a/c does not turn on efan on '00 & '01 models.
06-24-2010, 03:23 PM
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Year: 2001
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06-24-2010, 04:26 PM
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06-24-2010, 04:51 PM
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Year: 2001
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The AC/Defrost engages the e-fan. That said, the coolant temp sensor on the bellhousing also engages it when the temps push 230'ish or higher. 210-225 is the normal running temp for 'em with a stock thermostat, and where they like running at.
Edit: My 2K1 stays smack on 210*, my old '90 Laredo liked 220* until I did my big cooling system overhaul last summer, now it runs between 195-200*)
Edit: My 2K1 stays smack on 210*, my old '90 Laredo liked 220* until I did my big cooling system overhaul last summer, now it runs between 195-200*)
Last edited by kidkodiak; 06-24-2010 at 04:53 PM.
06-24-2010, 05:32 PM
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Year: 1998
Model: Cherokee
Engine: 4.0L HO
Ok, my bad, I was relaying what others had posted regarding the efan operation on '00 & '01 models. It's also been posted that '00 & '01 models could be re-programmed by the dealer to make the efan operational when the a/c compressor is engaged. I believe 218F coolant temp is what the ECM/PCM sees to engage the fan, not what that goofy factory gauge displays.
Plug a scan tool into the ALDL port and watch the coolant temp yoyo (especially this time of year)........that's why I say "that goofy factory gauge".
Plug a scan tool into the ALDL port and watch the coolant temp yoyo (especially this time of year)........that's why I say "that goofy factory gauge".
Last edited by djb383; 06-24-2010 at 05:36 PM.
06-24-2010, 06:00 PM
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