CORP. MICRO BIRD IS RECALLING CERTAIN MODEL YEAR 1999 THROUGH 2001 GIRARDIN MB II AND MB IV SCHOOL BUSES BUILT ON FORD AND GM CUTAWAY CHASSIS FROM AUGUST 2, 1999, THROUGH MAY 31, 2001, AND EQUIPPED WITH A TRANS/AIR TA73 EVAPORATOR. THE EVAPORATOR UTILIZES A POWER RESISTOR TO REGULATE BLOWER SPEED. SHOULD A SHORT OCCUR IN THE “LOW OR MEDIUM SPEED” CIRCUIT WHILE THE BLOWER IS IN HIGH SPEED, THE SHORT WILL CAUSE THE SUPPLY VOLTAGE TO FEEDBACK THROUGH THE RESISTOR TO GROUND, NOT DRAWING ENOUGH CURRENT TO TRIP THE FUSE.