HEATING ISSUE

GOOD EVENING. THE ORIGINAL COMPLAINT WAS THAT THE CLOTHING WAS NOT DRYING. THREE WEEKS AGO I TOOK APART THE DRYER AND FOUND THE BELT AND PULLEY OFF OF THE BLOWER. I PUT IT BACK TOGETHER AND SHE WORKED FINE FOR THREE WEEKS. I THEN GET A CALL SAYING THE BLOWER IS WORKING BUT UNIT IS NOT HEATING. I TOOK IT APART AGAIN AND FOUND THAT FIRST THE DRYER THERMAL CUT OFF DID NOT HAVE CONTINUITY. I HAPPENED TO HAVE A USED THERMAL CUT OFF THAT SEEMED TO MATCH. THE ONLY DIFFERENCE I FOUND WAS THE ORIGINAL HAD AN 352F ON IT AND THE NEW USED HAD A 309F. I PUT IT IN AND SHE LIT UP, BUT ONLY STAYED ON FOR ABOUT 6 SECONDS, NEVER IGNITING AFTER THAT NO MATTER HOW LONG IT RAN. AT THIS POINT I TESTED THE DRYER THERMOSTAT AND IT DID NOT HAVE CONTINUITY. I HAPPENED TO HAVE A NEW USED ONE THAT WAS ONLY 5 DEGREES HIGHER (265 – 270). PUT IT IN AND EVERYTHING WORKED WELL. TWO LOADS WHERE DRIED THAT NIGHT, BUT THE NEXT MORNING SHE WILL NOT HEAT AGAIN. THE ONLY OTHER POINT WOULD BE THE DRYER WAS RUN A LOT WHEN THE BLOWER WAS NOT WORKING. I NEVER WORKED ON A DRYER WITH THE STEAM ASSISTANT. AM I MISSING SOMETHING THERE, OR SOMETHING ELSE? HELP!!!!!!!!!!! TODD FROM NY