Beginning to disassemble the exhaust fan and finding out what is wrong with it and trying to get it to spin at a consistant speed.

So far, I think that the problem resides in the controller provided in the exhaust fan unit. However, there is also a strange clicking noise in the fan part, which is not even moving in the same direction half of the time.

I also need to learn how to use this function generator too.

P.S. I was so used to nothing working so I was so shocked that I forgot there should be a current reading in the DC power supply.