Haven't posted here for a while, I recently bought a 92' RS 305 and whenever I turn the heater,defroster, or vent on there is a squeaking noise. Then when I adjust the fan from a low setting to a high setting it gets louder and more consistent. When I am driving or the rpms raise it doesn't change pitch or anything like that is stays consistent. It is driving me nuts. I never had this problem before so I am lost. BTW I did a search and didn't find anything. Any help is greatly appreciated!!!

 

Sounds like the fan is squeaking

Replace the blower motor

About $20 and 10 minutes

 

free