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Anonymous Posted on Jun 30, 2009

2003 Grand Cherokee Overheating

Basically the Jeep overheats slowly when sitting idle and driving. I noticed the radiator fan comes on. The radiator is 2yrs old and I just replaced the water pump. I was thinking about going after the thermostat next??

The belt looks to be in good shape so I don't think its slipping.

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This might help you as it looks as though you have an electric fan to cool , there should be a sensor on your radiator hoses upper and lower.they are actually switches triggered by the coolant temperature in side the hose. While your Jeep is sitting idle, shut off the AC as it adds to the heat off the engine not to merntion useing more gas. you should make sure both high and low speeds on the coolant fan work. good luck if this does'nt help check out the post, with more, on the 1995 Jeep heating up..

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  • Posted on Jun 30, 2009
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I would change the thermostat as well.

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