We have a Samsung RSH5SHMH bought in 2011. Recently it started making a short grating noise every 5 minutes. Eventually, it stopped cooling/freezing this morning. We've now defrosted it. Since turning it back on, the noise continues to happen every 5 minutes. The condenser fan is working fine, and there is no ice impeding any fans on the interior.
What could it be? I've recorded a short video clip which captures the short sound we hear:
What could it be? I've recorded a short video clip which captures the short sound we hear:

