AC or not?
AC have 2 speed fan. Not has 1 speed fan.
2 speed "dead" can be resistor relay or switches for low speed. jump high speed switch to ground to check the motor.
If 2 speed replacement w/ 1 speed motor have to rewire the motor connection.
See my Cave, Rad Fan
------------------Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
(Jurassic Park)The Ogre's Fiero Cave
[This message has been edited by theogre (edited 05-09-2018).]