how do I know if its the resistor OR the blower motor that needs to be replaced? on 2008 Mitsubishi Outlander

I am reading the comments regarding the blower motor/resistor on the Outlander. I have a 08 Outlander SE, the ac/heat/defrost will not blow on any setting. I heard a weird noise coming from the glove box area, almost like a high-pitched whistle with the ac on. This only occured once, and lasted maybe 10min. Two days later, Im driving and the ac just stops blowing... no hot air, NOTHING!

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1 answer
The resistor and blower motor can both be tested.From your description , it sounds like the bearings in the blower motor failed and it locked-up.