You'll need to pull the glove box and remove all the cables from the heater
box (one behind the glove box) and two on the (I believe left) side.
Remove the two screws from behind the ashtray and pull the facia out.

Be sure to take the cables loose first.  If you don't you will damage them
or your heater control.  Try to pull the facia out as squarely as possible.
This will help keep from breaking the retaining tabs.  Also, keep on the
lookout for other hidden screws.  I believe the two I mentioned are the
only two, but be gentle just in case.