To be fair, this failure's usually not the thermal fuse's fault, but the real cause lies in a partially (or completely) clogged dryer vent system. In those cases, the thermal fuse is just doing the job it was designed for.
Thermal fuses, or
thermal cutoffs, are small electrical temperature sensitive 'switches'
designed to interrupt electrical current flow when heated to
their specific rated 'trip' temperature.
Unlike a thermostat,
which automatically resets itself when the temperature drops, thermal
fuses are more like their cousins, electrical fuses, another single-use
type device that can't be reset and must be replaced when it fails or is
triggered.
In addition to their
legally mandated application in modern clothes dryers (since the
1980's), thermal fuses are used as safety devices in other
heat-producing appliances like coffee makers and hair dryers. They
disconnect the flow of current to the heating element in case of
malfunction (such as a defective thermostat or clogged dryer vent) that
allows the temperature to rise to dangerous levels, possibly starting a
fire.looks lke this
and the last thisn is the heating element it'self
most of them look similatr to this one below but once again yours may be different
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