This is my first "attempt" with a vintage kegerator. I have a vintage 1950's HOTPOINT refrigerator that has been turned into a kegerator with a A419 Johnson Temp Controller. I have a SP of 42 which the refrigerator can hit, but I am trying to cool one of my stouts down to 39, but the "kegerator" cannot get that cool...it keeps running and running and running with the temp going no lower than 42. I am thinking it may be either a low freon issue or an issue with the kegerator's gaskets (I was running a hose between the gaskets for the "beer gas" and the temp was not getting any lower than 50...pulled that out and the temp dropped to 42). Any suggestions? I do not have any experience with vintage refrigerators at all.