Removed dryer drum to access loose lint inside the dryer cabinet. Cleaned out dryer cabinet and inspected parts for defects. Dryer internal drum support components are in good shape. Reassembled cabinet and tested dryer. CONCERN: dryer making abnormal noise. DIAGNOSTIC AND CAUSE: disassembled dryer and inspected components Found dryer blower wheel cracked and found drive motor damaged. CORRECTION: cleaned out cabin. Replaced blower wheel, drive motor and bracket and tested, operation is now normal.