HE4 110.95866402 gas dryer keeps blowing thermal fuse

Brand:Kenmore
Model Number:110.95866402
Main Symptom:keeps blowing thermal fuse
What happens & when:After replacing thermal fuse the dryer will work and dry 6 or so loads then thermal fuse blows. Second time I replaced fuse I also replaced thermistor. Again dryer worked a few times the blew fuse again. Vent is clear, high limit thermostat has continuity.

Error Code (if any):
Parts or tests already tried:thermal fuse; thermistor
Photos / video link:

Start by checking that the vent is a 4-inch-diameter rigid metal pipe (no plastic, vinyl, or metal-foil vent material). Check for minimal turns and length. Check to ensure the vent is clear all the way out from the blower, all the way outside. The number one cause of multiple thermal fuse failures is airflow. Next, check the wiring and element circuit for damage or shorts.
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