Haven't had my '57 Chevy Panel very long and I just found this today:
Here is a better shot of its location. Has the word TEMP on the face of the knob and a temperature tube loosely stuck into my a/c-heater box. It turns easily and seems to be previously set on a "middle" setting. I don't know what it controls, as I have a temp lever on the dash. Part of the add-on a/c?
