All the PDF files linked on this page are taken from Skutt.com or from training literature made available by Skutt Kilns. All files are PDF and require Adobe Acrobat reader.
EnviroVent Motor Replacement
These instructions explain how to replace the motor on the older style EnviroVent that mounts under the kiln.
Video – EnviroVent 2 Overview
While this is not a video specifically on repair, it does give a good general overview of how the vent works.