Rebecca J Portsmouth , OH October 18, 2024 Appliance: LG Refrigerator LFX33975ST/01 Lg Refrigerator Lfx33975st/01: Loud grinding noise. How to replace Motor Assembly. Took the back freezer panel off to find exactly what we suspected. There was ice build up around the fan which explains the noise I’d been hearing for months. Took out the old fan and replaced it with the new. Also defrosted the ice before putting it all back together. Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes