How can you tell if its the resistor pack or the motor itself is bad?

 

No easy way. But hell, the resistor pack is only like $15 or less so I would go that route first. If replacing the resistor pack does not work, then it may be the motor or the fan speed switch but from what I have seen, resistor pack is mostly always the culprit.

 

I'll try the resistor pack first then. Thanks for the response.

 

I believe that if it is the resistor, then the fan will work ONLY in the high position. All other speeds will not work.

HTH,

IndyD