Update--The temperature controller fried for some reason. The fuse link did not blow. I happened to have just pulled into the garage so I smelled the melting wires. I replaced the controller and installed a new fuse link with a lower amp fuse. It is a week later and all is normal.

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X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interior
Dallas