Julian G Rockwall , TX November 01, 2017 Appliance: Whirlpool Microwave Oven 1.5 Cubic Foot MT4155SPQ1 Whirlpool Microwave Mt4155spq1: The door button was broken and the turntable wheel was missing. How to replace Support. It was a piece of cake. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes