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WP8318268 This is the part number of the cycling thermostat. It is rated at 155 degree and should cycle the heat off and on this thermostat and if it goes bad it would blow the thermal cutout.
No if that blew it would stop the motor.Here is your wiring diagram below.
Only video about that housing i could find.https://www.youtube.com/watch?v=PCYHypbqFhg