How do I replace a 2000 Toyota Avalon blend door actuator?

The blend door actuator is one of the heating control units found in the center console. Purchase a console tool and remove the plastic console cover after dismantling the front of the heating control. There should be a series of clips that hold the plastics on. Once you get to this point you'll want a tray to keep track of screws. Unscrew the mounts for the control unit and pull them out, taking care not to damage the ribbons or cables connecting the unit to the heating and cooling unit. Unplug the offending actuator from the control unit and plug the new one in. Then reverse process to reinstall the control unit and plastics.

You can find diagrams on google, and the actuator on amazon.com or rockauto.com.

NOTE: Caution; make sure to disconnect the battery to prevent potential electric shock.