Re: 2005 Jeep liberty 3.7 v6
I would do a block test, the 3.7l and 4.7l engines blow head gaskets if you look at them funny, your typically doomed with a single overheat. I would figure out where the coolant went that you replaced to get it home. If there is nothing external, I would further look at a head gasket failure.
I am not positive, but IIRC most chrysler products do not run the electric fan with the engine off even with the key "on". If you think about it, what is it going to do anyway, cooling the coolant in the radiator isn't going to do anything for the engine temp without the coolant circulating.
The fact that you state you added coolant and were able to get it home, I would focus on where the coolant is going, do a block test!
2005 Jeep Grand Cherokee - Gone but not forgotten!