Here's what it looks like stand alone.
The part number is D8BH-19A706-AB. Ford, if I remember correctly. You should be able to repair it with a thermal resistor. It's that small, cylindrical thing that sort of looks like a diode. It needs to be soldered in. It was the same set-up on our 2002 Diplomat and our 2003 Windsor and both of them had failed thermal resistors. So far, the Country Coach has not needed this repair.
These thermal fuses are so common that Radio Shack had three flavors in our local store. The direct replacement is rated at 262 degrees F, Radio Shack part number: 270-1322. Apparently these things commonly fail so it seemed that maybe they were spec'd on the low side. Given that, I elected to purchase the 288 F flavor (270-1320) which is about a 10% bump in temperature threshold. The really good news is that the price of one of these fuses is $1.69, plus tax.
I'm not sure how many Radio Shacks still stock that kind of part. Many of them are out of business or exist as a cell phone sales outlet.