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Re: AC blowng through defrost only
yuuuup. We realized we had a problem with the 4x4 hubs in our super duty when we went to put in 4x4 via the dash switch. The AC started blowing out the defrost vents and didn't seem like it engaged. Both vacuum lines to the hubs had broken.
it's a safety thing to default to defrost if no vacuum. Depends on the model Ford as to what year they started using blend doors for vent selection along with temp
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03 dsg mach1 - MPR built 9.5:1 motor, D1, cams, ported intake, full exhaust, magnum t56, built rear, E85 etc...
'12 F150 FX2 Supercrew with Ecoboost daily beater
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