1968 AutoTemp I

[ViaJoaquin@xxxxxxx]

My car makes the same noise when the ATC is switched off or if it gets starved for vacuum on long hard acceleration. I think it's the diaphragm on one of the half dozen check valves that fluctuates and makes the noise.

 

Roy

67 Crown FDHT

 

In a message dated 7/6/2004 7:08:04 PM Pacific Daylight Time, desotobravo@xxxxxxxxx writes:

One thing still puzzles me about AutoTemp I. Why does
it make a brief buzzing sound when "Off" is pressed?
Perhaps that is the sound the fan relay makes?