To enter fan test - with key in position 1 or 2, press and hold both AUTO buttons for >10 seconds, until the fan starts. To end fan test, turn key to position 0 or press and hold both AUTO buttons for another >10 seconds.

And there aren't any "lower fasteners." It sits in a pair of rubber blocks at the bottom of the radiator. The only bolts holding it in are on top. As I said, it's a very easy job.[/QUOTE]