So I take the car to our local install shop. The guy says he thinks the switch is probably just gummed up, but he will call Code 3 just to see how much a replacement switch will be. The Service Tech tells him Code 3 no longer makes a replacement slide switch, and the unit needs to be sent in for an "Upgrade." Huh? I find it hard to believe that Code 3 doesn't sell a replacement slide switch for the Mastercom. Even the new ones have a removeable slide switch. So anyways, the installer cleans the switch, puts the thing back together, and everything works just fine. Anyone know what this "Upgrade" consists of?