Dash air- fixed it!
As many threads as I’ve looked at about everything blowing through the defroster, I failed to find my solution. The threads did convince me that it was a vacuum problem. I started at the three dial controls and traced the small vacuum lines to where they went, but didn’t find a problem. I found a YouTube video of a guy whose chickens had kicked a vacuum hose loose, and I had not found the place where his line was disconnected, so I found it. I don’t have any chickens, but over 19 years mine had deteriorated and come loose. I found a little piece of rubber hose that fit tightly over the line and the connecting point, and all is well. It was one of three lines going into about a 12 inch square box on the passenger side, about even with the front wheel. I’m like James Brown, “I feel good!”
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