Kool-o-matic access

[K Sarich]

Good Morning,

This new to me coach has the dropped ceiling which is covering the Kool-o-matic grill. Put the camera up there and looked into the 1" clearance between the ceiling and drop ceiling and the the grill is visible.

The fan does not turn on, which I will investigate, but I am wondering if anyone else has this set up? Firstly, how does one shut the damper, if there is one and secondly might there be a switch somewhere that controls the damper. At this time I can not feel a draft so unless BB mounted a Kool-o-matic just for looks something must be acting as a closed damper.

Additionally I can no find no mention of the Kool-o-matic in any fuse charts or wiring diagrams. Maybe it is just up there for looks...

Thanks