Question about 2002 Jeep Grand Cherokee
Overheat is causing by insufficient cooling. It is true the the Thermostat not open causing cooling stagnant not circulating to remove the heat then causing overheat. It is tru that the fan not turn on when the engine hot to assist cooling then engine overheat. The fan is running by electric activated by a temp sensor on your block engine. It this sensor is bad most likely then the fan gets burnt out since you said it works before. They could charge you for the fan by just replacing the temp sensor. If you locate a sensor on top of your block engine then, take off the wire from it, the fan should run when you you turn key to on. If it is not then you can jump short the 2 terminal of the wire off the temp sensor to turn on the fan. Or you can locate the 2 wire from your fan, pull tem off and check resistance from the 2 terminal any reading but not open that tells you the fan is good. Or you can connect the 2 wire to you battery to see if it turn on. The point is that you can check to see if their diagnosis is correct or not.
Other thing I recommend is if your fan working and after replacing the temp sensor , the Overheat problem is still exist, then flush out your radiator since it is the culprit. You may have to replace the radiator. Good luck.
Posted on Jul 20, 2009
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Posted on Jan 02, 2017
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