If that's still the case install a small computer fan. I wouldn't mess with the thermostat too much
http://www.homebrewchatter.com/boar...-home-depot-dual-tower-conversion-from-t6665/
Here's a link to my dual tower conversion...works perfect. As already mentioned, I have had the same kegerator for almost one year and it works great. I recenetly got a dual tower from Micromatic (prob the same Kegconnection sells, I know Beveragefactory sells MM) and it works great on the opening. All you have to do is drill new holes for the screws to mount it