My fridge makes loud popping noises and is over cold (freezing the things in the fridge & frosting up the freezer, when it is a frost free freezer)

SOURCE: Refrigerator

It may well be the defrost control. They have a turn slot to advance them if the timer quits. You need a little aptitude to find this and check it. If you think you can do it let me know, and I will walk you through it.

SOURCE: lg frost free fridge freezer gr-399sq

on the back wall inside the freezer unscrew the white panel and then remove the panel behind this . you should now see a tray that runs the width of the freezer with a driphole on the left-hand side which will probably be frozen with ice , chip away whatever is possible and then put boiling water on the driphole and once this is clear you should find the problem sorted , 1 other option is to turn the fridge/freezer off for several days and this will allow the ice build-up to thaw thus resolving the problem

SOURCE: Refrigerator is making a loud buzzing sound in the

check your evaporator fan maybe the fan blade hitting edges or the shaft or bushing has damage cause of buzzing sounds apply lubrication or replace bushing but before you dismantle try to off the unit.