What I mean is, we installed a ceiling fan that has 4 levels of speed. The problem is thatthe lowest setting is too fast, and the highest setting can almost move furniture. Does anyone know if there is a way to adjust the speed of a ceiling fan internally so that the settings are less drastic?

Answer:
No. The speeds are determined by the number of “poles” in the motor. In your motor, there are 4 coils, each with a different number of poles. What you do with the switch is select one of the four sets of poles. Sorry, the coils inside can not be modified to change the number of poles without destroying the integrity of the coils. Think of a 3 position light, where you selectively energize with a low position, medium position and then a bright position. Most fan motors are fixed in the exact same manner as the 3 level light bulb. SOME, have a variable speed control that mounts where the wall switch would be to turn the fan on and off. Your best bet is to shop around for a replacement, preferably one with a variable speed control which works exactly like a lamp dimmer does, continuously variable from almost a full stop to whatever. I recently replaced one similar to yours with another fan, with separate speed and dimmer controls for the motor and lights. And yes, it DID cost a few dollars more, but now that I am using it, I do not know how I tolerated the old clunker I had before…

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