I'm using KiCad 5.1.7 and have created a simple circuit just to see what happens.
It contains a fan, an unpolarized capacitor (110 μF) and a VSource. [Just wondering what happens...]
When I try to simulate it using the simulator, I'm getting the following error:
Error on line 4 : m1 net-_m1-pad1_ net-_c1-pad1_ fan could not find a valid modelname Error: circuit not parsed.
Looking through , it seems that I need to find the right model; but  applies only to the op-amp IC and not some generic fan. What is the right model for a fan?
 - http://ngspice.sourceforge.net/ngspice-eeschema.html#BipAmp