: Humming noise on Coupe DeVille (1976)

03-27-07, 06:49 AM
Okay...Another weird question:

When I put the key in my ignition on my 1976 CDeV and turn it to the RUN position...I hear a humming noise...basically sounds like a small motor running or a blower running. Very faint....but loud enough to hear. I was suspecting it was the ATC cycling the vehicle's inside air through the small dashboard vent over the passenger side...:confused:

Just curious.

03-27-07, 11:19 AM
You are correct - it is the blower motor.

03-27-07, 11:49 AM
I figured that is what it had to be....the ATC needs to sense the inside air compartment, right?

Whew...so glad it is SUPPOSED to do that!

03-27-07, 11:50 PM
Hmm Mine did this too, so I diconnected the blower motor because it was annoying me. I guess you wouldn't want to do that since your AC actually works!