Question about 1999 Jeep Grand Cherokee

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Noticed when I'm idleing, jeep gets over 210 deg. Electric motor that starts fan works, does it need a new themostat or water pump. Why is it doing this. I am a widow and need your help.

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  • drpepper293 Nov 06, 2010

    I been told that 210 and over is to hot, should like you say run around 180 to 195. Its in the 40 and 50s here in Missouri as far as out side, like to get this fixed,

  • drpepper293 Nov 06, 2010

    Well I own't know tell Monday, everything is closed around here today, Talked to alot people and they think the same as you do, but I may need to flush the radiater, and it could be the water pump. I love my Jeep thou. Thanks for your input. Karen

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  • Jeep Master
  • 6,674 Answers

If that is higher than usual, then it probably needs a new thermostat, but 210F is normal in some applications. Thermostats are commonly 180F, 195F, and 210F. I suspect your is a 210F anyway, as the fan comes on when thermostat opens and coolant returns to radiator for cooling, thus fan is activated. I'd just keep an eye on it if that's not where it normally runs, and if temperature gauge goes too much higher than that, then I'd have thermostat changed. Make sure to check coolant level in return bottle to make sure it's at proper level as well. I don't know where your living, but here in Canada, 210F is good for getting better heat inside for the winter.

Posted on Nov 06, 2010

  • 2 more comments 
  • Mike Butler
    Mike Butler Nov 06, 2010

    Are you still with me here?

  • Mike Butler
    Mike Butler Nov 06, 2010

    Sorry, I didn't get notice of your reply, my apologizes. Yes I would certainly change thermostat and have it flushed at same time.

  • Mike Butler
    Mike Butler Nov 06, 2010

    Ask that they use a 195F for new one.

  • Mike Butler
    Mike Butler Nov 06, 2010

    Don't think water pump will be the problem, just a good flush and new thermostat should do it. Good Luck. If it seems like your getting the run around, tell them to forget it and take it somewhere else, or get back to us with what they say is wrong, and we will advise you. Take care.

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