Fan start when stereo turned on

This will also let you know the windings in the Motor are good as well.John DeRosa (Hotwaterwizard)

Stockton California

When in doubt, try it out !

Excellent. John I was wondering since there will be some resistance through the windings, but we don't know how much..would it not be better to use a bulb with at least a 12v rating for longer potential bulb life? Of course we can't determine the brightness either way without knowing the resistance and ratings of the bulb but, if the resistance is very low I would fear sending too much volatge through a lower v rated bulb..you agree?

I have used this circuit in the past. The bulb never reaches full potential unless the windings are shorted. Larger than 8 volts is way too dim. A stereo indicator bulb from an old junk stereo works great. They are usually 8 volts. Remember the old Stereos with the Dial string and a Stereo Light? John DeRosa (Hotwaterwizard)

Stockton California

When in doubt, try it out !

couldn't agree more. I am moving and recently sold all my "junk" boxes so I don't have anything lying aroung presently. otherwise I would have taken measurments..tried different bulbs..just for the heck of it. whats the worse that can happen..a blown bulb in the name of science...very worth it.

Thanks so much for all the answers I'm kinda new at this and learnead alot from your diffrent thinking. Good support here :).