EASY FIX! AFTER CHANGING BOTH BLOWER MOTORS AND MICROWAVE BULB, I USED THE SELF CLEAN CYCLE, THEN THE OVEN WOULD NOT HEAT UP! THE UNIT IS 16YRS OLD, SO HOPEFULLY THE NEW DESIGN OF THE THERMAL OVERLOAD WILL HELP? TIME WILL TELL! ALSO, ONE OF THE BLADE CONNECTORS FIT LOOSELY, SO I JUST CRIMPED IT WITH NEEDLE NOSE PLIERS FOR A SNUG FIT, AND WHILE THE BACK WAS OPEN, I CHECKED ALL CONVECTION FAN AND HEATING ELEMENTS FOR LOOSE CONNECTIONS! MY PART WAS SHIPPED FAST! THESE PEOPLE ARE ON IT! HIGHLY RECOMMENDED!+++++THANK YOU AGAIN!