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My 98 V8 5.2 Grand Cherokee Limited overheats when it's stuck in a heavy traffic, as soon as I can take it over 60mph the temp goes down.

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It may be the fuses/relays to the fans, the fans or more then likely the thermostat sensor is bad. i would replace this first if all the fuses/relays are good. Hope this helped Tim

Posted on Oct 02, 2010

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Posted on Jan 02, 2017

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98 jeep grand cherokee stalls,backfires intermittently


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Temp. guage indicates overheat 10 mins. from startup


Hi Reggie, I'm glad to help. TWO things I want you to check. ONE: You have changed out a lot of stuff, so you may have air trapped in the cooling system, you'll need to remove the radiator cap and let it run until your at operating temperture, while watching to make sure it doesn't overheat on your of-course. If after running the engine say 30 minutes and topping off the coolant if needed, it still runs hot. Move on to: TWO: If you have the electric fan, some do, some don't. If it is electric make sure the fan is coming on, if it doesn't come on then you have found your problem, replace the fan assembly. Hope this helps and have an awesome day Reggie!

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The temperature gauge on my 2000 Jeep Grand Cherokee started running hot (about 3/4 up), as soon as I start moving (even when the car is cold). It comes down to normal (about 50% on the gauge) when I stop...


Change the sensor, but it will run hot like that if you are not moving fluids across it. It is basically measuring air temp for a minute. Could be a totally stuck thermostat. Change both. That cooling system is critical on a cherokee.

Oct 08, 2013 | 2000 Jeep Grand Cherokee

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My 2000 Jeep Grand Cherokee overheats in traffic


Check the fuse for the fan and use a test light to make sure that the circuit is functioning. Warm up your car then feel along the top and bottom of the radiator to check for cold spots. If you find any then you may need to replace your radiator. If your heater isn't currently working it may be that since it is a part of your cooling system.

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2001 Jeep Grand Cherokee Laredo Overheating


Three possible solutions:

1. Bad Thermostat

2. Fan Relay (most likely)

3. Bad Fan

When the GC reaches a temp of 180 Deg. F the fan relay sends a signal to the fan to turn on, once the temp lowers (around 155 Deg. F) the relay turns off the fan, and so the cycle continues. If the relay is bad there will be no signal to the fan to run. While you are driving your vehicle there is ambient air moving thru the radiator, cooling the engine, but once you encounter slow/heavy traffic or stop there is no air moving and the temp goes up, the fan will not kick in and the vehicle will overheat.

If the fan motor is not working the same will happen, but a more expensive fix, as the motor comes with the fan.

If the Thermostat is stuck in the open position, the water travels to fast in the engine and heat exchanging is not an efficient process, therefore the vehicle might overheat when stopped or in slow traffic.

Mar 31, 2009 | 2001 Jeep Grand Cherokee

2 Answers

Temp gauge goes to full hot while at Idle


Check the auxiliary cooling fan for operation. As the engine temp rises, it should kick on to bring the temp down. U may have a bad motor on the fan, or more likely a bad fan switch.

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1 Answer

1990 jeep cherokee 6cyl inline- electric radiator fan inop.


the aux fan only works when the ac is on, and has come to a predetermined temp(?) i found this out while going up a long grade in the back country without the ac on and later found out the radiator was half plugged!

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