The first thing I would do is remove the front and the rear panels. Remove the lint chute assembly (#1 on the
break down diagram) and clean all parts from lint. Make sure the blower wheel is not broken.
Assemble it back and run a few loads with the vent hose disconnected from the dryer.
Post the results.
Here are the break down diagrams for the Whirlpool dryer
Model LGB6300LW0
Gene.