DOMETIC HAS REPORTED A SAFETY RELATED DEFECT COVERING 745,574 TWO-DOOR REFRIGERATORS MANUFACTURED BETWEEN JUNE 1, 2003 AND SEPTEMBER 30, 2006, WITH SERIAL NOS. 320XXXXX THROUGH 352XXXXX; 401XXXXX THROUGH 452XXXXX; 501XXXXX THROUGH 552XXXXX; AND 601XXXXX THROUGH 639XXXXX, INSTALLED IN CERTAIN RECREATIONAL VEHICLES AS ORIGINAL EQUIPMENT AND SOLD AS REPLACEMENT EQUIPMENT. A FATIGUE CRACK MAY DEVELOP IN THE BOILER TUBE WHICH MAY RELEASE A SUFFICIENT AMOUNT OF PRESSURIZED COOLANT SOLUTION INTO AN AREA WHERE AN IGNITION SOURCE (GAS FLAME) IS PRESENT.