Quoted from gdogfunk:

Well, I came home and double checked the connections in the back box and discovered an unrelated loose screw holding the 'diners', put it all back together after activating the switch a few times and everything seems back to normal! When you change settings from hard to medium, etc., do you need to turn off and back on for those settings to take effect? Although, I turned on/off last night and it made no difference. Oh well, at least it's working!