MY FURNANCE STOPPED WORKING AND THE LED BLINKED TELLING ME THAT THE ROLLOUT IS OPEN.WHAT IS A ROLLOUT? THE SCHEMATIC SHOWED 4 ROLLOUT SWITCHES WHICHED I CHECKED WITH A DVM AND THEY WASN'T OPEN. CAN SOMEBODY HELP ME WITH THIS PROBLEM. THE FURNANCE DOESN'T HAVE A NAME ON IT, BUT I ASSUME ITS A COLEMAN BY CHECKING THE SERIAL NUMBER.