Quote:
Originally Posted by oil pan 4
Yes I tried that. When the system loses vacuum it defaults back to the floor vent. The little vent switcher must be spring loaded.
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Maybe some kind of vacuum 'reservoir' could be added. Or maybe rig up a manual choke type cable to move the flap manually. Either one could be a lot of work...
I'm tempted to get something like https://www.frostfighter.com/clear-view-bus-front-windshield-defrosters.htm for the Previa. I don't know why more cars don't have a front defroster wire for the wiper parking area, it seems like a good idea. 'Course, doesn't warm up the rest of the car any faster, but for a freak snow/icestorm while you're at work/shopping/whatever, at least it'd help clear the windshield so you can get underway sooner (and help eliminate standing outside with the ice scraper).