Overheating, Fans Work, Going NUTS!
#1
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Overheating, Fans Work, Going NUTS!
Just removed the electric fan so I could put the wires right to the battery and it works. New relay for the COOLING fan. Thats what it says on the relay cover. What dose it take to get the electric fan to come on? Is this fan in any way a part of the ac system? I have nothing on the dash controllers that work. Both ***** do nothing. The overheating is not major. The temp gauge stays around 210.
Thanks
Thanks
#2
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Year: 97
Model: Cherokee
Engine: 4.0
Sounds normal
Just removed the electric fan so I could put the wires right to the battery and it works. New relay for the COOLING fan. Thats what it says on the relay cover. What dose it take to get the electric fan to come on? Is this fan in any way a part of the ac system? I have nothing on the dash controllers that work. Both ***** do nothing. The overheating is not major. The temp gauge stays around 210.
Thanks
Thanks
I am finding that these things run at about 210 as a normal operating temp. my electric auxiliary fan will not come on until it gets to 212 or a little more.
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ijeeep (03-23-2021)
#3
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Year: 1998
Engine: 4.0
210* is within operating range for the cooling system. You're fine.
Electric fan will not come on until a/c is engaged or temp gets above ~217* I believe.
The gauges in the XJ's are not finely calibrated tools so they do not give exact readings.
Electric fan will not come on until a/c is engaged or temp gets above ~217* I believe.
The gauges in the XJ's are not finely calibrated tools so they do not give exact readings.
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#6
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Year: 1998
Engine: 4.0
Just the one in the black box under the hood I believe.
May be the coolant temp sensor:
https://www.cherokeeforum.com/f2/199...-switch-47179/
May be the coolant temp sensor:
https://www.cherokeeforum.com/f2/199...-switch-47179/
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#7
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Year: 1998
Engine: 4.0
Here's another link that CCKen has posted some good info in also:
https://www.cherokeeforum.com/f2/ele...orking-130670/
https://www.cherokeeforum.com/f2/ele...orking-130670/
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#9
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Year: 90,84
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Engine: 4.0,2.5
??? 210* is not overheating....
I think the fan switch is still on the radiator by the air cleaner in 94. I think you can reach the connector, (one of the two might be yellow). Connecting the pair should make the fan run.
I think the fan switch is still on the radiator by the air cleaner in 94. I think you can reach the connector, (one of the two might be yellow). Connecting the pair should make the fan run.
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#10
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Im not sure if your 98 will do this but on my 91 if I disconnect the plug on the temp sensor on the thermostat housing and start the jeep the fan will always be on. Also just a warning it will give you a check engine light to.
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#13
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Year: 1999
Model: Cherokee (XJ)
Engine: 4.0
big job, little problem
Anyone have overheating problems and tranny fault codes? Wanted to throw this out there. Fuse 10 controls the circuits for the electric fan, transmission range sensor, and reverse lights. I just did a whole top end rebuild because I was certain it had to be the head gasket causing the overheating. After everything was put back together, a long drive brought upon some more overheating. Found fuse 10 blown, no electric fan function. Some research into wiring diagrams led me to looking into that trans fault code. Low and behold, my transmission range sensor was sending power through the ground when you even pass through reverse. It was blowing the fuse every time you pulled out of park. I have a new range sensor coming Monday, so we will see what happens. I'm not a prominent member in forums but I felt the need to share my experience with you guys so you have some other direction to go if things don't make sense because I sure spent a lot of time trying to figure this out.
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Year: 1998 Classic (I'll get it running soon....) and 02 Grand
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Thread hijacking, especially of ancient threads, is not the way to get help. Post a new thread.
#15
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I have a 2004 Laredo that has had multiple cooling issues. I had the radiator fan go out, then the radiator itself started leaking. I replaced the radiator with a new one, and the Jeep seemed to run hot more often. It would not over heat just run warm around the 210 degree mark. The seal around the thermostat started leaking a few months later, I then replaced the thermostat. Still despite all the new parts, the engine runs warm. The mechanic at my work thought that there might be air in the system causing the engine to run warm (we also checked for a head gasket leak). A year later the radiator fan went out again (cheap aftermarket from the parts store). While I had everything apart again I decided to clean the overflow tank. It was nasty. While cleaning the tank I noticed that the small outlet to the overflow hose was clogged. I went ahead and got the gunk out of that. I then decided to check the the hose itself and it was also clogged. I replaced the hose and put everything back together after flushing the engine and newer radiator. To my surprise the jeep runs very cool now. It is spring here in Kentucky and around 70 degrees during the day, the warm weather has not kicked in yet. Curious I took to the internet to find out about if the overflow tank and hose being clogged would cause over heating and found out that newer vehicles use the tank to pressurize the system. Which would make sense why I was having seals leak and the engine running warm. I am not a qualified mechanic, nor would I consider myself shade tree level. This might help you diagnose your problem. BTW, the engine temp would go up very quickly when idling, and at stop lights, then drop just as quickly at highway speeds which I think would indicate air in the system. Now, just cool all the time.
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