Lawrence J Lancaster , NH May 27, 2021 Appliance: Whirlpool Microwave Hood Combo WMH78019HZ1 Whirlpool Microwave Wmh78019hz1: Missing a rack in my Whirlpool convection oven. How to replace Rack. I ordered the correct one which AppliancePartsPros.com had in stock. 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes