We had some problems at first since it didn't like our inverter. My husband could talk at length about different inverters and sine waves and modified sine waves and so forth, and about the electronics on newer appliances and how delicate they are. The bottom line for me was that we needed a different inverter. A neighbor had just replaced theirs with a bigger one and the older one was the right kind of "waves" that my husband thought would work better for the refrigerator.
He rewired our solar power system and put the refrigerator and a few other things on that inverter, and left the rest of the house on our old inverter. All went well for a few years.
I thought in the back of the mind that milk wasn't staying as cold lately as it should be. Friday I went to put something in the littler freezer and I thought "huh, some of this stuff doesn't feel that solid", so I turned the freezer up a little bit.
The next day, Saturday, we went to town in the morning and among other errands we picked up groceries. When we got home and I went to put the food away, the first thing I did was open the freezer to put in the bags of frozen mixed vegetables I'd just bought. It was barely cool in there and everything was partially thawed. I opened the fridge compartment and felt the milk carton. It wasn't very cold either.
My husband put a thermometer in the fridge and in the freezer. He tried a few other things, such as unplugging it for a while, then plugging it back in. He pulled out the manual and went through the trouble-shooting section.
I pulled out canning jars and got busy. I started with all the meat, vegetables, and broth that I had stored in the freezer.