I have a kiln I use to burn wax out of molds for lost wax casting. It is connected to an electronic controller that controls the temperature of the kiln and how long it heats and how long it holds at the set temperatures. It has worked well until recently. Now the kiln is completely dead when plugged into the controller. I sent the controller to be repaired but after testing was told it is operating properly, so it must be something in the kiln. The kiln fires up and heats when plugged into a wall socket. So I am mystified, as are the repair people I have been talking to. The controller hooks into the kiln pyrometer, which controls the heat. There is a thermometer on the kiln that shows the temperature. This seems to be working okay. Does anyone have any theories on why the kiln is no longer firing up when plugged into the controller?