I thought that it would be a simple fix - a loose wire or a broken switch - no such luck. So I am now on a quest to figure out what has happened to this "simple" device.
The unit contains a pair of two-speed shaded-pole motors that are controlled by a three position rotary switch - I have included photo of the motor and a wiring diagram below. I have not been able to find that much information about two-speed shaded-pole motors, but I would think that the three wires indicate a motor winding with a middle tap. I have measured the resistances between each wire and there is only continuity (11.3 Ohms) between the red and blue wires. This is the case for both motors.
If I connect the red and blue wires to ac power, the fan runs but it also gets very hot, very fast - definitely not a preferred operating state.
So my question is - am I missing something obvious, or did both motors fail in the same way at the same time?
As I finish writing this, my wife popped her head in to tell me that some of the Amazon reviews for this item mentioned sudden failure.
Any insight would be appreciated!