The heat is another
important function of a dryer. Many current dryer models have a
'one-time', non-resettable, thermal fuse or safety. These safety
devices will open should the dryer's vent not be installed properly,
or if it becomes restricted. Once this happens, the dryer will no
longer heat and will require the part to be replaced to correct the
condition. On some dryer designs (usually gas) failure of one of
these thermal fuses will totally stop the dryer operation
altogether.
On older models without one of these
thermal safeties, poor venting can cause the dryer to cycle on its
safety thermostat, instead of the temperature control thermostat.
This usually contributes to poor drying and can cause overheating.
On some models, the malfunctioning of the timer operation affects
some cycles.
