turn the dial and see if something happens
It is in the center of the HVAC housing, under the dash.
The blend door actuator on late model Dodge Durango and small pickup can be accessed by removing the glove box. There is a very common problem with blend door failure in these vehicles, and dash removal is required to perform the repair. A cheap and easy DIY fix for this can also be found at heatertreater. They also make a heater core regulator which bypasses the blend door and can remedy the situation with no dash removal.
Its located on the left side of the evaporator housing inside the truck behind the heater core shield...................
Most likely it's the blend door. Check heatertreater.net for a full explanation of system operation and potential failures.
Cannot speak specifically to a Oldsmobile but, on a Dodge product of same vintage it would be low freon. Either that, or it could be a bad control head, or a bad blend door actuator.
A 2004 Dodge Neon uses 5W30. It can be synthetic,, conventional, or a blend.
Probibly your blend door motor is stripped out. Remove motor and check door operation manually
5W20. It can be synthetic, conventional, or a blend.
5w30, it can be synthetic, conventional, or a blend.
It is in the center of the HVAC housing behind the dash.
5w-30 is recommended .
I think your refering to the door in the heater housing that directs air to vents, floor or defroster vents, there is also a blend actuator that mixes heated or cooled air to give the correct temperature from the selector.