Suggest you get a couple of thermometers to place in the fridge&freezer so you know what temps you're getting with each... See if the compressor is shutting off prematurely before reaching customary temps... Next check for an ice buildup on the evaporator coil behind the inside back wall of the freezer compartment... If there isn't any my guess from 4K miles away is a defective defrost end t-stat (AP3950837)... I just ran into one of these 3 weeks ago on what looks like a similar model... This goofy fridge worked fine when I showed up on 3 different visits but the 4th was when it was finally caught opening the cooling circuit prematurely... Without a cold enough freezer you're going to have ice melting and running out of it... Good luck, kooler