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Old 02-06-2011, 02:38 PM
Xtremehumpdog Xtremehumpdog is offline
Dodge Ram Forum Newcomer
Join Date: Jan 2011
Location: Elizabeth City, NC
Posts: 16
Gender: Male
Vehicle: 2001 Ram 1500 Sport 4x4
Trim Level: Sport
Color: Silver
Engine: 1998-2001 360ci (5.9L) Magnum V8 245hp(standard), 250hp(Sport package)
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Angry I have vacuum but cannot switch from defrost

Hello all,

I have read the forum regarding this topic and the general consensus seems to be Vacuum and the check valve on the line into the cab. My check valve works correctly and I have 20" of vacuum at idle. My blend door operates correctly, heated mirrors work, and the selector knob will shut off the air. The knob will only turn off or on with the Defroster vents, it will not engage A/C as well. I took the switch out and saw the vacuum lines. If I have 20" at the firewall does that mean my switch is bad? Haven't priced one at the dealer yet but I could imagine the cost.
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