T800 hvac controller, defrost inop

[Hammerhead]

They look like a Grand Piano, only Barbie doll sized. They get the command from the controller and have a servo that rotates the air deflector door to the selected position. A similar item is located under the hood where the hot water line comes into the heater core to control the temperature for an example of what your looking for. I haven't done one yet on my '09 T800, but on my '97 Pete it was behind the glove box and I'd assume it's probably in a similar spot on the KW based on heater core location.