Product review (5 stars): Replaced both and dryer has been running fine for the past week
The first time my Duet dryer failed to heat, I replaced the blown fuse.  The thermostat had continuity, so I did not replace it.  The dryer ran for three loads, then the fuse blew again.  Talked with my friends and we decided the thermostat might be the problem, running too hot.  Purchased this set with the fuse and thermostat together.  Replaced both and dryer has been running fine for the past week.  We average about three loads per day.