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