I'm having a problem with the gas valve a generation earlier than the smart valve with no circuit board on top, but maybe a smaller one inside... works for 10 minutes or so then seems to need an hour to 'cool down' before working another 10 minutes... I'm thinking there is a bad connection in that one somewhere's also... there's still 24V at the main valve terminals, but main valve closes after 10 minutes, and get an open circuit inside the gas valve assembly...