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I got this of of a portable heater with a fan and it had labels for fan speed. it has four settings when you turn it. When i try to use on a motor to control the speed it just works as a switch. Do i need a motor with 3 wires if so how do i wire it up? Is it something different.

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Jack A Lopez

Best Answer 7 years ago

The device you've got there is a rotary switch, that is to say, a switch activated by turning a knob.  You said the wires are labeled: [L, 1,2,3], and I am guessing that "L" stands for "line", one of three wires you'll find in a typical AC mains power connection.  The others being "N", neutral, and "G", ground.

Anyway, I am guessing that turning the knob on that switch will alternately connect L to the other three wires, 1,2, and 3. Checking these wires  with an ohmmeter will tell you how they are being connected for each switch position.

This switch is intended to work just that fan motor, or just that kind of fan motor, with windings that match the wires on the switch. 

You cannot generalize this switch to make it control the speed of any kind of motor.  It just works with the kind it was designed to work with.

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redlizard5

7 years ago

K thx so this is trash since the motor broke.

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iceng

7 years ago

+1