Question about 2003 Jeep Grand Cherokee

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Fan keeps running after engine is shut off

Shut off the engine on my 2003 Jeep Cherokee, went in to eat breakfast with my family. Came out and the battery was dead. Looked under the hood and saw that the fan was still running. What would cause that to happen.

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It is normal for the fan to run when engine is off. Engine temps actually rise when the engine is shut off, the heat will rise through the engine compartment. So a Coolant temp sensor controls when the fan shuts on and off, obviously based on the temps of the anti-freeze. The fans are a high draw item, but It would take much longer than an hour breakfast for the battery to run dead. I would check out the battery and charging system first. Is the CEL on? Let me know and we will trouble shoot from there. Thank you for using fixya.com

Posted on Oct 05, 2008

A bad radiator fan control relay located under the passenger side head light about a 60.00 part

Posted on Oct 19, 2008

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The fan will occassionally continue to run for five or ten minutes after the vehicle shuts down. This is normal.

What is not normal is if it keeps running until the battery drains.

Does it just keep running?
If it eventually shuts off, how long does it take?
Did this just start happening?
The two days you mentioned, were they short trips, opposed to the third day?

If you would comment me back with some more details, it would help me help you.

Mike

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