LeSabre V6-231 3.8L VIN 3 SFI (1988)
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Vacuum hose is connected and not pinched.
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Vacuum is present when valve is moved from rest position. If vacuum is not present, replace the A/C Mode Selector.
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If none of the valves operate, check for vacuum at the Violet hose to the Heater and A/C Control Assembly.
