Hi. I have an older model Santa Fe. I recently replaced the vacuum switch and hose as pellets wouldn't drop. That fixed it but control box was buzzing. This morning, no buzzing, pellets dropped, igniter heated but no flame. Rechecked holes in pot. Seem clear. My thermocouple cable is very dirty and is flat as it comes out of stove base. Looks crushed. Could this be it or is it likely my control box is bad? Appreciate your help. Thank you