Ray G Sun City West , AZ January 29, 2018 Appliance: Whirlpool Built-In Microwave IBMS1455WS0 Whirlpool Microwave Ibms1455ws0: Mi. How to replace Waveguide Cover. Microwave cover had hole in it. Replaced with part ordered. No problem. 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes