Fan runs very fast after engine is shut off. Runs for about a minute or so and shuts off. Any idea what the problem is and how to fix? 2002 XK8 Convertible.

 

Thermostat.

 

If it runs that long it's an indication that the engine is too hot. The temp. gauge does not display the actual temp. once the engine has warmed up until it overheats to the point of disaster. There is a lot of information on the forum about the use of wireless OBD adapters that can display information like real time temperature to a smartphone, which just about everyone but me owns. Elm 327 is one of them and if you do a search here there will probably be others.

If it is actuallu overheating it could easily be something as simple as a stuck thermostat or failing water pump.