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1997 Oldsmobile Regency

 

Question: A/C works, blows thru defroster and lower but not bi-level

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PensFan, Crescent, PA, December 28, 2009, 15:50
 Rookie

A/C and heater both blow fine upper and lower but neither will blow thru bi-level. Is this a fuse, vacuum hose or what? If it's a hose where would it be and would it be disconnected or something else? Would it be under dash or in engine compartment? Thanks Very Much Bill

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  • Answer #1

    Oakman December 31, 2009, 13:24
     Master

    The a/c mode doors on your 1997 Oldsmobile Regency use engine vacuum to operate. The vacuum source in under the hood. You should find a squarish black plastic tank mounted on the center of the firewall under the hood. Make sure the vacuum hoses are properly connected and you have the proper vacuum supply from the engine. Also check for proper operation of the check valve in the vacuum supply line from the engine.

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