The Model number is FSEC849GHS0. I havent been able to find it anywhere.
1. Getting excessively hot at the back on top, and behind.
2. Vent length is corrected to 7 feet, and is made from corrugated metal. I hope that will help.
3. I double checked for shorts but there are none. Since I ran a few cycles without the hose I observed the element again and it was uniformly glowing, and seemed to shut off correctly for the different cycles. Just not sure of the temperature. Still seemed just as hot during the low heat and high heat cycles, but the length of time it was on before shutting down seemed correct, so there might not even be a problem anymore. Could there be a thermostat problem maybe? Or might have just been the exhaust?
I'll put everything back together and see how it goes with a real load.