Buick LeSabre air flow

Diverter.

What year?

On many gm's there's a vacuum resoirvoir on the drivers side, mounted to the hood. It's a "ball" a bit bigger than a soft ball. Look carefuly at the hoses coming to this. If one falls off or is cracked, the a/c system will usually be stuck in defrost - all air comes out the defrost ducts.

No high air.. do you mean it won't go to recirculate mode? Or the fan does not change between position 3 and 4?

No recirc would be affectd by a cracked or disconnected vacuum hose also.

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Sorry missed posting the year. 1996. It is a limited

It has automatic temp controls with additional control on passenger door.

1996

where might that be located/

1996 LeSabre...

My diverter between defrost and mid doesn't move. The servo checks good. The diverter between defrost and mid can be seen from the mid air outlet to the right of the radio. The Blue vacuum line from the vacuum block behind the glove compartment controls the servo which is up above and to the right a little of the gas pedal. Another servo up there with White and Green vacuum hoses from the block controls two? diverters in the main lower duct right behind the ashtray. The other servo in same location with Orange hose has a link that goes down near the gas pedal linkage and controls the Recirculate door.

Thank you

M>>