GEW9250PL1 on Auto cycle,runs for a few minutes then buzzes, indicating the clothes are dry. They are not, and 1 or 2 more cycles are required before the clothes become dry. This was not a problem when dryer was new June 06. Lint screen is cleaned every load. Exhaust duct is clear from fan wheel, thru fan housing, thru duct and out flapper vent. Airflow out vent is good with dryer running. Suspect sensor or control board problem.