Spec sheet says it's a shaded-pole motor, so I thought a ceiling fan control would work.
The one that I tried, didn't. Purchased at Lowe's, "Lutron" brand, FSQ 2FH DK. This is advertised as a 'silent' control, ie, reduces motor hum. Three speeds, rotary knob, like a dimmer switch, but discrete clicks, Off-Hi-Med-Lo-Off. The motor ran full speed on Hi no problem; Med was turning maybe 10% to 20% normal, and Lo didn't rotate at all.
Suggestions for something that will work better? I don't mind either putting it into the junction box on the back of the stove, or into a box complete with stub cord and controlled receptacle (could use that with box fan in the summer!)