AC Box Rebuild-Missing Flapper Door

Dana67Dart said
Seems like there are 2 switched to "bypass" or 2 different methods (different AC boxes?)

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Yep, that answered it. Looks like mine is the top one.

There is a “tang” on the clip that attaches the rod to the actuator rod. I don’t have that clip/tang so I’ll probably just fabricate something up.

Though it doesn’t really seem like that switch “has” to be there.