Hi,

For sure check the sensor bars as Tom suggested....if coated, clogged
with hair or lint the sensor may tell the control the wrong info and
the dryer thinks the clothes are dry.

http://www.repairclinic.com/referral.asp?R=153&N=1806
Automatic dry feature sensor assembly with mounting screws.

jeff.
Appliance Repair Aid
http://www.applianceaid.com/