My 72 Cutlass Supreme does not have A/C. Blower motor switch on the heater needs to be replaced. Is there a difference between the switch for a factory A/C car and one for a non-A/C car. If so, what is the difference? Anybody have what I need?

 

They are completely different. The heater-only switch has three speeds, the A/C switch has four. Different wiring, different connector, different speed resistor in the HVAC housing.

 

Thanks for the detailed answer, Joe. Should have just messaged you from the gate.