the one from Classic Parts is the original style

I'm with Bill, looks like the control is in the wrong hole, and if any part of the wiper mechanism hit it that's why, but looks to me like the rheostat coil just failed and caused too much current draw

Bill

Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
Some TF series details & TF heater pics