02 jeep laredo temp rises when idoling

Asked by Jan 23, 2016 at 08:03 PM about the 2002 Jeep Grand Cherokee Laredo 4WD

Question type: Maintenance & Repair

My jeep temp goes up when the jeep is sitting still,
but once start driving temp goes back down. What
could this be. I just replaced a heat sensor.

9 Answers

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50,905

Is the fan turning on? Check to see if the electric fan is turning on.

1 out of 1 people think this is helpful.

You can hear it kick on but dont think its staying on

50

how high does the temp when at idle ? if it reaches over 190 degrees could be low coolant or not an even 50/50 mixture . possible bad thermostat and water pump.

50,905

You said you replaced the heat sensor? What about the temperature sending unit? This could affect how the fan turns on and off.

1 out of 1 people think this is helpful.

It has a 210 thermostat, goes to 230 when idols.didnt replace temp sending unit.

50,905

Never heard of a 210 degree thermostat, it should be a 195 degree. IF that is in fact a 210* change it out to the 195*....210 degrees is like the highest you'd want to get too.

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