Are these normal refrigerator noises? fixit

1) https://www.youtube.com/watch?v=Jwoum54HHaU 2) https://www.youtube.com/watch?v=OzOKpJWGxOw

First video demonstrates a consistent knocking sound that speeds up until it finally quiets down.

Second video demonstrates a similar knocking sound, but more random. Most of the time it sounds like the second video. Sometimes those knocks/rattles transition into a quick groan before returning to a knock.

The sound begins to happen maybe a minute or two after the compressor starts and continues until it switches off.

After the compressor switches off, I can still hear the knocking/rattling along with refrigerant circulating around for 30 seconds or so, which leads me to believe that it might be air bubbles in the refrigerant.

Are these normal sounds? I don't think I've ever heard such a noisy fridge, but maybe this model is just particularly loud?

Submitted December 01, 2016 at 01:53AM by NewDevon http://ift.tt/2gySHgn fixit