I know that the wood fascia must come off first, i.e. the 2 screws to which you refer. What I'm referring to is an inner fascia of sorts. It's a black plastic plate which snaps onto the front of the control unit. That has to come off in order to open the control unit, which I think needs to be done in order to replace the fan switches. My trouble is that I can't get the black plastic plate off because of the air flow buttons. They seem to prevent the plate from coming off. How do I get the air flow buttons off???