I have a 69 Cutlas and getting the heater/AC fan switch is difficult. In 70 they went to a different type switch. I'm wondering if they are interchangeable? Or can you switch the entire assembly? Do they continue using vacuum lines for dampers? The newer switch which goes up and down vs. turning is available. Might have to modify the front plate a bit. basically i need a solution for a bad fan speed switch.
thanks,
Steve

 

did you find a climate control assembly for your car?

 

68-69 is a rotary switch. 70-72 is **** that moves up and down. They only "interchange" if you change the whole control plate.

 

I took it apart and discovered I was not the 1st person to do so and it was not reassembled correctly. It now works fine. Joe, just wondering if the 70 control uses vacuum lines as well. Would they be interchangable?
thanks,
Steve

 

The A/C cars use the same vacuum controls. The heater-only cars use cables. The box under the dash is the same from 1968-72.

 

Quick question. I have a feeling I need to replace a heater core, is it difficult in an AC car?

Steve

 

It's difficult on any 68-72 A-body. You have to at least remove the inner fender to access the fasteners that hold the HVAC box to the firewall. If there's any rust, the odds are high that at least one of the clip nuts that hold the inner fender to the outer will spin when the bolt seizes, which will force you to remove the whole fender.

 

Oh Boy, does not sound like a fun job. So it would be removed from the engine compartment side? Thanks for the response

 

The heater core is in the box under the dash. It comes out from the passenger compartment. It's fastened to the firewall with fasteners (bolts and nuts on studs) that must be accessed from the engine side of the firewall.

 

I'll add that when you do that, put in a new blower motor at the same time. That's a MIGHTASWELL that's well worth it.

 

Thanks for the quick answers, it gives me something to think about while my broken leg recovers.

Steve

 

I do have the one for a 68-69