When I have my A/C on, it blows cold and everything but there is a sound that sounds like it is comming from the blower motor. When it is sucking air from outside, the noise is not very loud, and cant be heard very well. WHen I switch it to recurculate the air from inside the car, the noise is so loud, I can hear it louder then the radio when the radio's up all the way. It's like a screeching loud, whining noise. I think it could possibly be something with the blower motor, maybe it's dirty or something? Or with the recurcullation door? Thanks for any input.

 

What kind of noise is it?

 

I got it. I took the blower motor down, and there was a booklet in there hitting the motor as it was spinning. Took the paper out, cleaned the squirrel cage, and it's working perfect now.