zack..i get a similar sound but i have always attributed it to the fan when it runs at middle or slow speed and makes a noise..does your a/c cut out on acceleration? mine does and i have not been able to locate the cause... --- Zack Morton <zmorty74@xxxxxxx> wrote: > Hello all. The Auto Temp II in my 74 Imperial > works great, but somewhere under the passenger > compartment, there is a buzzing when the heat, or > air is on at some middle temperature. (not at 85 > and 65 degrees.) It happens once the cabin has > reached the desired temperature, and then it starts > buzzing. Could it be a servo that is not quite > sealing all the way? Any help on what the problem > is, and how to fix it would be great! And, if it is > the servo, can I repair it, or do I have to buy a > new one? Thanks a lot! > > ~Zack Morton~ > '74 4dr. LeBaron > >