Cynthia R Smithton , IL July 05, 2014 Appliance: Whirlpool Microwave Hood Combo GH6178XPS1 Whirlpool Microwave Gh6178xps1: Broken handle. How to replace Door Handle. Unscrewed the panel on the door, unscrewed the old broken handle & screwed in replacement, reassembled the door. Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes