The windshield position is the default position when you have lost vacuum. Let us know the specs (brand, engine, tranny, etc) on your coach and we will be able to give you more help.
DICK
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2010 Phaeton QTH 40'
2017 GMC Sierra Crew Cab pickup 4X4
Recon, D,2/7, 1st Cav '65
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