I took it apart and discovered the blower wheel had a broken hub. This was the first time I had ever worked on a dryer, so my first thought was to buy a new dryer because I guessed it would be expensive to repair, or hard to find parts. I took a picture of the model/serial number tag and checked for a part on the internet at appliance parts pros. Found it almost immediately, and cost only about 25 bucks with shipping. But the best part was the video that showed exactly how to replace it. That video saved a lot of trial and error. The only things you really need to pay attention to is the belt routing (look closely before you remove it) and make sure the seals are positioned correctly. Overall, the job was not too difficult. I spent as much time cleaning lint and re-doing the vent pipes as I did replacing the blower.