Loud noise coming from icemaker...noise decreases

loud noise coming from icemaker...noise decreases when i increase temp and goes away when icemaker shut off.

I set the initial temp at 3 degrees, then let it make ice - after about 3 hours it sounded like a cross between a jet and a harley... really loud noise that could be heard throughout the house.

Shut ice maker off (lifted the wire) noise went down and after about 10 minutes stopped entirely. Bumped up temp to 6 degrees and tried again...noise came back after about 30 - 40 minutes but was less.

This refrig has already been in once for SY FE or SY EF error - which tech said was a lose connection - Frig is brand new.