At first I thought it was the rollers so I replaced those put it back together but it was still making a horrible banging noise. When putting it back together I noticed that one of the teeth on the blower fan was missing. I ordered a new Blower fan. Took everything back apart and took the van cover off and saw that it wasn't just the teeth but the entire fan was broken. But it would not come off. It had been glued onto the motor bolt. Took my torch to heat it up and finally get it off. Everything back together and works now with out being insanely loud!!