scratching noise under glove box when ac/heat fan is turned on
I have a 97 ranger 4.0 v6 5spd with 83,000 miles. On the way to work this morning i needed to turn on my defrost. When i did i started hearing a scratching noise (seems like the fan) on the passenger side of the cab (sounds like its just under the glove box). It doesn't matter what i turn the dial to (defrost, ac, floor vents) as soon as its turned on the noise starts. I'm think the fan blade is warped and scraping against the shroud it sits in (like when you have a bent rim on a bike and as the wheel turns it rubs on the brake pads). Any suggestions or how to go about looking into this would greatly be appreciated.