HVAC error code
 

I have a 1995 C4 cab. I used my durametric scanning tool to trouble shoot my HVAC system. It showed an error 24-fresh air flap motor.

Has anyone come across this error / problem before. Can anyone give me a guide or a quick how-to tutorial on how to fix the fresh air flap motor. How do I access it?

Thanks for the help

It's the servo in the front trunk that opens & closes the vent. They go bad, cost like $130, & takes about 20min to swap out.

Thanks. On the parts diagram, I see three servos. How can I differentiate which one is bad?

Here's a great 964 HVAC DIY

The fresh air one is the one on top.