DT*: THE CONSUMER STATED WHILE DRIVING, THE PASSENGER SEAT WARMER BECAME VERY HOT. THE PROBLEM WAS NOT NOTICED UNTIL A COAT IN THE SEAT CAUGHT ON FIRE. THE COAT WAS DISCARDED FROM THE VEHICLE WHILE MOVING IN ORDER TO KEEP THE FIRE FROM SPREADING. THE PASSENGER SEAT WAS DAMAGED AS A RESULT OF THE FIRE. *JB