Question about 1999 Jeep Grand Cherokee

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I have a 2000 keep grand Cherokee and I'm having problems with my temp hand I don't have a lot of money so I can't afford to take it to a real shop but what it does is when I sit still with it running the hand stays in the middle but when I drive it around town the hand falls like its about to run hot when I check the hose it's tight I have put a temperature sensor on it thermostat and I'm still having the same problem please help me

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  • 310 Answers

Does the fan kick in.
are all tubes hot front and back.
does the heat in the cabin works fine?

Posted on Oct 18, 2013


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Posted on Jan 02, 2017

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SOURCE: Check gauges light comes on

Sounds like a CPU problem. your radiator may need a good flushing a s well. i would also check the heater core for any unusual problems like seal break or leakage.

Posted on Feb 11, 2009

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SOURCE: radiator fan not working replaced relay,temp

You didn’t mention replacing the temperature sensor located on the block in the path of the ‘cooled’ coolant.
I can’t tell you any closer where to look for it since you didn’t specify which engine you have.
This device is a solid state item called a thermistor.
With the air temperature around 77 degrees F and a 'cold' engine, it should measure about 10,000 Ohms and hot, around 1,200 Ohms while disconnected from its mating connector.
With the ignition on, and the connector disconnected from the sensor, you should measure about 5 volts coming from the ECU.
If this has failed, the ECU is not getting the right info back from the sensor and doesn’t know if the fan is needed or not.

Posted on May 26, 2009

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SOURCE: I am trying to troubleshoot my wife's 2006 Jeep

i would say change the thermostat its a possibilty it's sticking and not opening when it should be i would change it and see what happens from there

Posted on Oct 22, 2009

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SOURCE: how to replace the Battery Temperature Sensor

it is located under the battery in the battery tray.

Posted on Jan 22, 2010

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did u bleed the air from the cooling system? if not u need to do that, u have air pockets getting around the thermostat, to bleed raise the front up as high as poss with a floor jack, fill the radiator and coolant recovery tank as full as poss, then run engine until it reaches normal temp, then shut it down and run cold water over the radiator,this will draw the coolant out and the system will bleed the air out.

Posted on Aug 04, 2010

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call your shop and ask. (ask is a flat rate shop or real)
all that varies, by many factors
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why ask this, here, ask the real shop. or ask 3 and average.
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nothing trivial.
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I have a 2004 Jeep Grand Cherokee Laredo, it runs toooo hot, i have to keep my heat running even when we have warm weather!!! During the winter i have no issues with over heating. What is causing this?????

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Aug 15, 2009 | 2000 Jeep Grand Cherokee

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Try replacing the coolant temp switch. The one that sends signal to the ECU. I hope this helps

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