Kenmore Series 80 Dryer - Keeps blowing thermal fuse. Vent is cleared. Humming sound when door is opened in mid-cycle--unless switch is moved to off. If not, fuse blows.
The heating element is shorted to ground. You will need to replace the heating element and the thermal fuse, both available at the link below.
Heating Element $40.77
Thermal Fuse $6.99
wheres the link???
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SOURCE: location of the thermal fuse on the kenmore gas dryer 80
It is mounted on the rear of the dryer on the blower housing. 
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SOURCE: kenmore dryer blows thermal fuse
http://www.applianceaid.com/whirlpool-dryers.html click the link
SOURCE: I have a May Tag dryer which blows the Thermal Fuse.
I am not 100% sure, but I think that the model that maytag had with that dryer. When I was working for my local dealer I had to change several of those, and it about 2 weeks time they blew.
SOURCE: kenmore series 80 gas dryer tumbles no heat
Yes. If the thermal fuse has no continuity, then the fuse is bad. Replacing it should get you back in action, barring any other defective items like the heating element, etc. Best wishes.
SOURCE: Thermal cut-off blows and high limit thermostat is
in this case we put the lower temp thermostat in the oven at 170 degrees till it was hot and measured with ohm meter and it was open. After it cooled down some it went back to being a short. Now with this part in the dryer and the new high temp thermostat
and it blew shortly after being turned on. A possiblity is that there is a short by passing the 150 degree thermostat and the element keeps being on and causes the 350 degree thermostate to blow.
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