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98 STS Blend Doors?

6719 Views 16 Replies 6 Participants Last post by  MoistCabbage
I have had the STS about 9 months now and having gone through summer/winter season, I think I may have blend door issues.

In the winter, the heat is working, but the car is still cold.
In the summer, the air is working, but the car is still hot.

I believe from the blend doors not closing completely and letting outside air into the cabin. Gets a little better on Recirculate, but still not blocking the outside air.

Where are the blend doors on a 98 STS? No codes.

Robert D
1 - 2 of 17 Posts
This is really strange. If your air blend doors were not working correctly you'd have codes, one for each side, but I don't recall what they are at the moment. My Seville gets them once in a while. Do you hear the doors trying to move when you cycle from a cool temp to a very hot temperature?
1 - 2 of 17 Posts
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