SOURCE: 2001 jeep grand cherokee overheating
is the radiator fan coming on and staying on, or not coming on at all?? i was having the same problem, and it turned out to be a fan relay switch which was pretty easy to replace. around 40 bucks, and maybe 30-45 mins.
SOURCE: Radiator fan will not turn off in my 2000 Jeep Grand Cherokee
usually the engine relay or cooling fan relay..!
SOURCE: my jeep grand cherokee started overheating at idle
try the water pump - first - make sure the radiator is really full - take the cap off cold and fill - if it looks full - start and run 8 minutes or so - then fill it up - look at ur fan belt - is it tight - tight is about how much pressure u use to make a firm hand shake with little movement - any movement over about an inch is loose - when the jeep warms up the belt can slip and not even make a noise - - new materials don't always squeal. - then be sure ur water pump is ok - they go slowing - the fins wear down - one more thing is the radiator - u don't say how many miles or what maintenance schedules you have or not so that's it for now
SOURCE: 2004 jeep grand cherokee overheating
check the thermostat or your radiator might be stopped up
SOURCE: 2004 jeep grand cherokee overheating and loud noise
sounds like one of two problems your fan is not working properly or you radiator is particularly restricted
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