Unit keeps running after manual override switch in OFF Low voltage wires disconnected> Problem Relay Switch bad! How to Replace relay? I have never done this task before. Any one who has tried doing? has done successfully, please help I am OK with some electric work, but not a pro. I have some tools, can dismount the unit from bracket, open the top. Then what next?

Vacuums - Broan-NuTone - CV450 Central Bagged Central System Vacuum