range fan hook up red, black, white wires

SofaKing

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Mar 18, 2004, 1:43:18 PM3/18/04

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I'm salvaging an old range hood to use as a fume ventilator. The fan blower
motor has four wires one white, black, red and a ground wire. Resistance
between the white and red is ~15 ohms, between the white and black is ~ 10
ohms, between the red and black is ~ 5 ohms. Which is/are hot and which is
neutral? Is it two speed because of the extra wire? Thx.

Charles Spitzer

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Mar 18, 2004, 2:03:55 PM3/18/04

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"SofaKing" <sofaking@sofaking!@#$.com> wrote in message
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it's two speeds.

SofaKing

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Mar 18, 2004, 2:22:37 PM3/18/04

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I'm guessing white is neutral. So if I want high or low depends if I choose
black or red. I hope.

"Charles Spitzer" <charlie...@nospam.stratus.com> wrote in message
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Dave Harnish

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Mar 18, 2004, 2:24:50 PM3/18/04

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Your red wire is the low speed winding. W/B should be normal speed,
W/R should be low.

If in any doubt, just run it on the bench in series with a 100W light bulb
before wiring it in permanently. That way, if there's something shorted
or it's an odd wiring code, you'll not damage anything.

As an aside, one of the handiest tools on my bench is a receptacle mounted
to a board, with a pair of porcelain pull-chain sockets wired in series with
it.
One pc socket has a light bulb in it, the other a 600W heater cone, for
heavier loads. Works great when testing anything like this, and doesn't
damage anything if you mess up. When checking AC stuff like this, I usually
grab an alligator-clip AC cord and plug into this before reaching for the
VOM. Learned this trick from my Dad, a lifetime electrician, and played
with one of these setups in his shop when I was little. 'Had his vise all
covered with spark-drawn pictures from using one of the heater cones.
My brother and I used to see how high we could go in bulb wattage and
still hang on, but that's another story... (I hear those of you who know me
saying, 'that explains alot...' <grin>)

Hope that's of a little help. Sorry to be so long-winded!

God bless,

Dave Harnish
Dave's Repair Service
New Albany, PA
www.DavesRepair.com
d...@sosbbs.com
570-363-2404

I'm a 32-year pro appliance technician, and love sharing what
I've learned - in a FREE Monthly Appliance Tips Newsletter.
(Back issues now posted here too!) www.DavesRepair.com

John 3:3

"SofaKing" <sofaking@sofaking!@#$.com> wrote in message
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SofaKing

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Mar 18, 2004, 2:44:16 PM3/18/04

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Great advice. I hooked it up with white as neutral and then tested the red
and the black individually. It seemed to spin up a little faster on the
black. But, it sounded like it topped out at the same speed. I'm wondering
if maybe it has something to do with compatibility with 220 volt system? It
is a stove after all. The range hood also supports a light bulb on the
inside. I'm guessing that most hoods would run on a 110 branched off of the
main 220.

"Dave Harnish" <d...@sosbbs.com> wrote in message
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ega...@gmail.com

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Aug 13, 2020, 9:23:23 PM8/13/20

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thanks for your clear answer!
I appreciate it!
take care,
Emrick