I follow the instructions in the WIS, I release the tabs with a screwdriver, pull gently and boom! The front comes off instead of the vent coming out. Fortunately I can put one back together in a couple of minutes.
Believe me I wouldn’t take it out if I didn’t have to. The vent kept jamming shut. This last time I discovered that the tab that keeps the control rod in the damper was broken off. I super-glued the ******* in and so far so good.