I have a Marvel undercounter 24" "Chauteau series" single zone wine cooler for only a little more than a year (so no warranty now), and i notice a few times the temp go way lower than my set point. I set it at 55F but the display shows temp at 48F. It doesn't happen all the time. It seems like no one really services Marvel (to my surprise) in my area. We checked both temp sensor and there is no error codes. Anyone else experiences similar problem?