Jeffrey R Grapevine , TX April 20, 2020 Appliance: LG Refrigerator LMXS30776S/03 Lg Refrigerator Lmxs30776s/03: Expired air filter and water filter. How to replace Water Filter Lt800p. Ordered the parts and swapped them out 2 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes