I've been having climate control problems lately. Thanks Arthur, I make the blink tester and pulled a code 13 out of pin 7. I did find the fan that pulls the cabin air past the sensor (the motor was burnt out) and replaced it hoping that would fix every thing. It didn't.

The center vent blows air (and I think outside air) all the time no matter what button is used except off, of course, and the housing fan comes on shortly after the engine is started no matter what the engine or outdoor temp is.

The recirculation button also comes "on" but doesn't do anything.

Any thoughts or help would be appreciated. Thanks!