Middle air vents

Normally this means the air distribution motor is the issue, but I am not seeing a separate motor for the outside and center vents.

This means we either have an issue with the door behind the front vents like a restriction or binding door or the front distribution motor has just failed. Again, this does not sound like a motor issue, but I doubt there is a restriction.

So, the only way we are going to figure this out is to start checking these items.

https://www.2carpros.com/articles/low-or-no-air-flow-from-vents

I am attaching the info below on how to remove the center vents and then you should have a better view as to what is happening to the door. If you can't see it use a mirror or borescope to see inside the box to find out why the air is not coming out the center vents.

Please run through this and let me know what you find.

Thanks