[bestgenman]

I don't think your problem is tied to air pressure.  First, let's look at the mechanism that operates the door.  It is an air cylinder with a very strong magnet on the ram internally.  The external portion of the cylinder has a slide that is magnetically coupled to the magnet inside.  See:
https://www.mcmaster.com/#rodless-air-slides/=15iauxw   , this is not the brand Newell uses but similar.  the door is connected to the external slide.

If an object restricts the door, the slide uncouples from the magnetic field.  It still works but now the magnetic field is not inside the slide rather on one or the other end and as the door reaches the end of it's travel , the magnetic field moves through the carrier (slide) to the other end and slamming against the end of the cylinder (inside).

How do I know all this?  Mine was doing the same thing and while at Newell, years ago, I went to door slide school.  The guys on the manufacturing side were perfect instructors even coming over to the service side helping fix my door.  My rod slide was behind a horizontal mirror above the door.  That was my problem with access but he used a cake knife to slice the adhesive to remove the mirror.  That gave him access to the carrier and by hand , he was able to position the slide back over the center of the magnetic field.  If you've ever toyed with magnets trying to hold them together as they are trying to repell will give you some idea of the operation.  the slide rests in between two opposing fields.

At least that's my take......