See the following hints from Repairclinic:
If your
dryer seems to run forever, it could be because of a clogged vent or
internal ductwork. Your dryer may have an automatic cycle that turns
off the dryer when the clothes are dry. It does this with a special
thermostat or moisture-sensing system.
Normally, this is what happens during an automatic cycle:
- The thermostat tells the dryer to heat until the interior of the dryer reaches a pre-set temperature--say 135 degrees.
- When
the dryer reaches the pre-set temperature, the thermostat tells the
timer to begin advancing. (If there's a moisture sensor, the timer
advances only if the moisture content of the clothing is low enough.)
- The
timer advances until the interior cools, then the thermostat tells the
timer to stop advancing, and tells the dryer to start heating again.
This
cycle continues until the clothes are dry. But…if the vent is clogged,
the dryer may never reach the proper operating temperature, so it
doesn't send the signal to the timer and the dryer continues to run
indefinitely, even if the clothes are completely dry. To fix the
problem, clean the vent and/or internal ductwork.
If it does not heat up, the element can also be faulty.
If you need to call a technician there is a phone number listed at the end of the user manual.
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