I have a GE GSL25JFTABS, side by side fridge/freezer. The freezer side hits the defrost cycle and gets warm to the tune of about 50-60 degrees for long enough to partially melt the ice in the ice bin. The ice bin refreezes into a lump that I have to break up with an ice pick. Small amounts of water leak down into the other items in the freezer below the bin and refreeze. Its a mess.

I can hear the fan blowing and sort of "slowing down" waning in and out if that makes sense, it doesn't seem to blow steady. When it is working it's fine.

A previous post suggested replacing the motherboard......ideas appreciated, i cannot afford to buy a new side-by-side!