First, dryer removed.
Next, hole cut in the wall so Max can access it.
Respirator on. That gray stuff he is sucking up is all lint!
Problem #1 discovered! See the broken joint? It is honest to goodness a miracle the entire house did not catch fire. Truly, it was. The pipe was buried in lint. Air could not flow at all.
This leads all the way to the other side of the garage behind that wall. There was lint all the way back there too! The picture had been taken after he vacuumed a lot of it up.