Question about 2001 Jeep Grand Cherokee

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Radiator fan for 2001 Jeep Cherokee

When in idle, my engine temp goes way up. I replaced the thermostat and flushed the system. The fan never goes on though. What could be the problem?

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  • serenitytwin May 11, 2010

    My fan works fine. I replaced the entire assembly. Someone said it may need a new water pump. I am tired of just guessing. I have put a lot of money into one problem. Help

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Had this problem and one thing that even Chilton manuals only show in fine print sorta say is that Jeep cherokee has a relay sensor for the coolant fan usualy right behind the passenger or driver side headlight you may have to remove the bumper also its rather easy.Its a liitle black box thats screwd down on the panel just unscrew it unplug it replace mine ran me around $60.00.Before I learned about this after replacing the thermostate and just about to rip out the water pump my buddy told me about the sensor after replacing over a year ago no problems.

Posted on Jul 23, 2008

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Have you "burped" the cooling system? I had the same issue. My fan always came on. Make sure you have your connections on tight.

To "burp" the system: (Jeep should be cool when atempting this)
Have 1 to 2 gallons of 50/50 antifreeze ready with running water from a water hose.
Park the car on an incline. (driveway or something simular)
Remove the radiator cap.
Start your Jeep with the radiator cap off
Turn on A/C with RECIRC and full heat.
Wait for Jeep to warm up to normal operating temps.

Once the jeep heats up, the thermostat should open allowing coolant levels to drop. This means that the thermostat is working. Air or bubbles should take place of the coolant lost. Top off the coolant in the radiator until coolant overflows from the radiator spout. Keep doing this until no more air or bubbles come from the radiator. This should solve your problem.

Posted on Jan 06, 2009

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It could be either the fan relay switch, or the fan motor itself may be dead.
The fan motor on my 2001 GC 4.0L quit, requiring replacement of the fan assembly ($189).

Posted on Jul 05, 2008

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