Been have intermittent problems with my Classic Bay 1200 FS for a while now. I decided to replace the control box. According to all the paperwork and instructions it's the correct box. After installing and setting the new box, I plugged it in fans started up LED inside the box was flashing appropriately acording to the instructions. When I turned the t-stat on I heard a big pop. The stove fuse blew. I decided to put the old box in with a new fuse. Same thing happened, except this time it blew the control box. It was actually smoking and smelled like spent electronics. I'm lost. Any ideas?