Driver side AC control knob doesn't maintain set temperature. on 2004 Cadillac Escalade

Driver side control knob goes ferom hot to cold while the passenger side maintains set temperature.

by in Huntington Beach, CA on June 08, 2012
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1 answer
ANSWER by , June 08, 2012
POSS BLEND DOOR MOVING WHEN ITS NOT SUPOSE TO. HAVE IT TESTED AND DIAG