Sounds like your blend door actuator went. There IS a way to test it. Now - I didn't consult the book and type this word for word to waste my time... While engine running - press OFF and FLOOR buttons simultaneously then press the AUTOMATIC button within two seconds. The display will show a pulse tracer in the display window.The test will run up to 30 seconds. If there is a DTC (Diagnostic Trouble Code) it will appear on the display. If there is - let me know what the code is - I have the book open and waiting! DO NOT turn the car off in diagnostic mode - hit the "cooler" button (BLUE) to cancel the test.
'04 Silver Marauder w/ sunroof - HID lighting, JL Audio / Eclipse DVD/NAV/iPod/camera, 4.10's, 2" drop, Progard Bumper Baffle, Delete tips, Billet Pedals, BC4E dead pedal, Lidio Tune, Mach1 chin spoiler, K&N CAI, TCE lines, Super40's, tinted tails, SS Inserts, Heinous Control Arms, Real oil gauge, lighted door handles. Currently installing Eaton M112.
2004 Mercury Marauder
Born March 2004, adopted October 2005. Sold January 2012, adopted AGAIN January 2016
2,187 of 3,214
997 in Silver Birch
448 with light flint interior
304 with heated seats
336 with sunroof