Funny noises coming from the frig aren't a good sign, and the temperature sensor might not be accurate either. Get at least one or two thermometers in there!
We very recently had issues with our FIVE year old refrigerator, didn't have free standing thermometers in it, and had the repair service out: 65F for two days in the frig! Got to throw out a lot of food, the fan died inside, so air wasn't circulating. Then, still not okay, the sensors telling it that the door were actually shut failed, so the fan didn't come on, and temps 42F to 46F, not awful, but not fine. The freezer wasn't affected at all.
You can pull it out, vacuum the back, but fix it? Not likely yourself. And spoiled food is no joke! Get a repair person to look at it, check actual temps with your free standing thermometers, be careful about the food.
Mary