Your 2000 jeep grand Cherokee Laredo overheats within the first 5 mins of start up and the radiator fan doesnt work whats the problem?

Answer 1

It dependslow coolant, no coolant, thermostat, then water pump check in that order. Im leaning toward thermostat since the fan never comes on which is telling me that the coolant at the temp sensor is not getting hot but don't rule out a bad switch on top of it all. If the radiator is boiling over when this happens and not just the temp guage on the dash then suspect the water pump and the temp sensor for the fan.

There is a sensor (If You Would Call It) Underneath Your Passenger side Headlight. I can't remember exactly what its called. But I'm pretty sure if you mention that to a store or mechanic they will know. If you must do it yourself. I'd advise something to cut with after you have removed your passenger headlight. because you must cut through the 'black' guard underneath the light.. be sure not to cut to deep.