I used one of these rotary switches, a fuse holder, a lamp and a 3D printed replacement board to repair an old air purifier (see picture). It is connected with 3 fan speeds (low, medium, high), perfectly match the wiring. To use these switches you will need to strip the wires about 3/8 inch. , 1, 2 or 3) and that's it. No soldering or screwdrivers are required, but you will need a hex socket or wrench to tighten the mounting nut. Works perfectly! Yes, I can recommend!
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