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Air Conditioning Vacum diagram for 1970


Big Jim

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It looks a little different from 1972.

I forwarded it to my friend Ned who has a danglng hose that looks like it has a yellow stripe and a firewall gromet attached to it. It hangs below the glovebox.

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Rod, are you certain this is for 1970? The reason I ask is it does not show the vacuum line going from the AC max control position to the heater hose control valve mounted on the right fender well. It also shows the vacuum check valve but not the vacuum storage canister. I believe the diagram you have is for late production (April 71)1971 and 1972.

 

Mike

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I believe the diagram you have is for late production (April 71)1971 and 1972.

 

you are absolutely right..It does make more sense. Good eye, I know I have the diagram for the other, but where it is, is the question. grin

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  • 6 years later...

I have another 72 Monte and have replaced all of the under hood AC parts and charges well but not blowing well through upper vents. I pulled Dash pad and Middle vent and see a actuator door that apparently goes to AC box and it will not open all the way no matter where I have the controls are but will close when set on heater. Could this be an actuator gone bad? Everything else seems to work fine.

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  • 2 weeks later...

I changed the source vacum line up to the tee near the switch and still not opening all the way. I guess it could be a bad actuator or a vacum switch under the the control panel. I was hoping it would be something simple. Maybe I'm not getting enough vacum but everything else seems to be working. Defrost and defog, Heater. The door closes when on heat. I feel like the door needs to open all the way on Max. Any suggestions?

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