My refrigerator was sounding oddly loud the past couple of days, so I decided to pull it out from the wall and clean out the dust. With a power blower. Yikes, that sent dust everywhere. But, it's cleaner now, and quieter. Plus, after 13 years, I replaced the copper water line to the ice maker that would jolt and make a loud noise every time I used the ice maker (which isn't often). I put in plastic tubing along with the water filter that was under my sink until a week ago. Ahhh, much better. No jolt anymore.