I have an old gas furnace with a pilot light. It's a Lennox F14-11A-7. I flipped the on/off switch one day, and it started sparking and smoking and blew up! I unplugged it, removed the switch, which seems to just connect two wires. I stripped those wires, twisted them together, and plugged the furnace back in. It didn't turn on. Is the whole furnace dead? Or is it just a fuse inside?

Please help

Thanks

UPDATE: It seems that a fuse in the fusebox flew, because there's an isolated portion of the house that doesn't have working sockets. So the furnace may have been taken out along with it. It's no use troubleshooting the furnace right now.

 

Obviously you have fuses to tend to, and probably have by now. But I'd like to know what "blew up"?