2005 Jeep Grand Cherokee 5.7 limited overheating when idle ? - Page 2 - JeepForum.com
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post #16 of 23 Old 05-04-2014, 08:48 PM
lavern23
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2005 LJ Wrangler 
 
Join Date: Apr 2011
Location: Louisville
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Trailstarved, I'm having the same fan issue. It won't run at all, no matter if the ac is on or if I'm pulling a trailer. I'm not having any overheat issues but the ac is not cooling well.

I guess I will try the dealer because of the stars can tool.

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post #17 of 23 Old 05-12-2014, 04:53 PM
TrailStarved
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2006 WK 
 
Join Date: Nov 2004
Location: New Jersey
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Quote:
Originally Posted by lavern23
Trailstarved, I'm having the same fan issue. It won't run at all, no matter if the ac is on or if I'm pulling a trailer. I'm not having any overheat issues but the ac is not cooling well. I guess I will try the dealer because of the stars can tool.
Any luck? It's getting warm now, and I won't get by with air cooling any longer, so I have to make a move. I checked, and my fan is running at 100 RPM no matter what. I DO hear a "click" which could be the solenoid or could be the A/C compressor clutch?
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post #18 of 23 Old 05-13-2014, 11:41 AM
lavern23
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I found that the fan is controlled by pulse type communication from the computer. My ac issue was that the evaporator block was bad on the firewall. I installed a new one and pulled down the ac system and then recharged.
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post #19 of 23 Old 06-25-2015, 11:53 AM
terryajohnson
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2005 FSJ Cherokee 
 
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cracked radiator

Quote:
Originally Posted by ttusqrl View Post
Can you actually hear your fan kick on and go into overdrive once it goes over the midway point on the temp gauge? I had this happened and checked my coolant which was non existant. I filled it back up and next thing I knew it was gone. Turned out I had a cracked radiator. You might check your radiator for spray (white marks) to see if that is causing the issue.
Same issue loosing coolent. checked top radiator hose connection. Gave the connection a squese and crusred the plastic hose fitting on the radiator.
Replaced the radiator alls good
Terry Johnson
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post #20 of 23 Old 06-28-2015, 05:42 AM
Marmalex
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2006 WK 
 
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my problem is that the fan is not spinning fast enough to cool down the ac radiator, and the high pressure on ac radiator is at 22 bar. i dont have enough power steering fluid in the tank thow, but i dont think that is influencing the fan speed. any ideeas?!? tomorow ill go to jeep dealership to see what they will say..
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post #21 of 23 Old 06-29-2015, 08:46 AM
terryajohnson
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2005 FSJ Cherokee 
 
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Over heating when idle

1St fill power steering unit this is what drives the fan. after I changed the radiator and started my jeep at idle it started to get hot. the power steering fluid was a little low. filled it au and started the jeep again, still hot, the the fan started to speed up. You can not imagin how fast it will spin. If that engine was in an engine stand it would have taken off, maby a little exaggeration.
Terry Johnson
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post #22 of 23 Old 06-29-2015, 10:42 AM
wave_crusher
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2006 WK 
 
Join Date: Aug 2009
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clogged radiator.
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post #23 of 23 Old 03-18-2017, 08:14 PM
omsok
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Join Date: Sep 2014
Location: ste julie
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Wk Hydraulic Cooling Fan Solenoid

Hi:

I am troubleshooting a similar issue with a 2007 WK Diesel with a Hydraulic fan. I can not get the fan to kick in turn on, or move at all actually. I am guessing solenoid is blocked or dead. Anybody have any experience with this on a WK Hemi or CRD? I have read a lot on the WJ threads, but it is a little different than the WK hydraulic cooling fan.

I have done a few checks of three wire connector going to solenoid, and I get voltage on all three. About 14.4 volts on ground and hot, and then less than a volt range fluctuating on the other wire and ground, which I guess is the Pulse Width Modulation.

Not sure what acceptable range is here, and of course it varies based on input form transmission, AC and engine temp.

One thing I did succeed in today was to "build a special wrench" to remove the solenoid with.

I converted a large unused wrench to the needed 23 mm by 5 mm thick in order to fit in between the hydraulic pump assembly, and the solenoid body. Worked like a charm as there is a lot of space between fan and engine. I put an oil drain pan underneath to catch the drip, which was not too much. maybe a few ounces.
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Last edited by omsok; 04-11-2017 at 05:57 PM. Reason: Additional info.
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