[2000 XLS Climate control issues]

The problem is the system no longer controls at the set temperatures (72degrees). I can drive the servos open or closed for cooling or heating if I increase or decrease the set temperatures to max heating or cooling. At this time this is an intermittent problem, this car does have duel controls and I am wondering what part the sensors may play in this problem? System can be controlled AUTO or Manual

[2000 XLS Climate control issues]

I am looking for a wiring, ducting and servo schematic drawings for my 2000 Avalon with automatic climate control.

The problem is the system no longer controls at the set temperatures. I can drive the servos open or closed for cooling or heating if I increase or decrease the set temperatures. I know that this could be at expensive fix and it may be best to just live with this problem.

Thanks for your input