Your amazing video addresses a common furnace problem, which is the blower fan not turning off. The quick and easy solution given to the problem is easy to implement, even for a novice who has no prior experience with repairing electrical appliances. We offer quality Armstrong furnace blower fans and other Armstrong furnace parts.
at least you took care of that sensor. sometimes they build smudge which leads to improper signal output to the valve causing the valve to shut off. fix is to clean it up by using sandpaper if it ever gets to that.