Loud Noise starts when using Heat or Air
 

Everytime I go to use the heater or air a very load whisling sounds come on? Just wondering what this could be and what I need to replace? Please let me know if anyone else has had this problem.

PS: The Air is cold and the heat is hot just a very loud sound starts. If no one knows what I am talking about I could upload a video I guess.

thank you

keith

RE: Loud Noise starts when using Heat or Air
 

must be the shaft on the blower motor which needs lubrication.

RE: Loud Noise starts when using Heat or Air
 

what kind of lubrication...WD40 or something?

RE: Loud Noise starts when using Heat or Air
 

WD-40, i think.