Heater Control Vacuum Switch Question?

[rarefish]

I have these two heater vacuum switches. They are both the 4 button type, but the one on the bottom has an extra set of electrical terminals on the back side. Would this be for car with factory A/C?

 

[62MAX]

I have these two heater vacuum switches. They are both the 4 button type, but the one on the bottom has an extra set of electrical terminals on the back side. Would this be for car with factory A/C?

View attachment 599363

Yes,this one.

 

[rarefish]

Strange... The part number on that 4 electrical terminal vac switch is the same number that I have seen on the 2 electrical terminal vac switches. I have been searching the 62-65 parts books trying to find a part number for a A/C vacuum switch as I had assumed that the switch that i have with the extra electrical terminals might be for a A/C car.

 

[62MAX]

Strange... The part number on that 4 electrical terminal vac switch is the same number that I have seen on the 2 electrical terminal vac switches. I have been searching the 62-65 parts books trying to find a part number for a A/C vacuum switch as I had assumed that the switch that i have with the extra electrical terminals might be for a A/C car.

If it has five 5 spade terminals and four buttons,it is an A/C switch,the extra terminal goes to the A/C relay that powers the compressor.

 

[ModernNostalgia]

On my '64 Polara with air, you don't turn the A/C on with the push-button switches; its controlled by the actual knob on the dash that controls the blower fan. It has a "heat" and "cool" direction you can turn it. I just assumed the pushbutton controls were the same for all cars! That wiring diagram above makes the system make a lot more sense.