Steven M Mount Juliet , TN September 04, 2016 Appliance: Whirlpool Microwave Oven MH1170XSB0 Whirlpool Microwave Mh1170xsb0: Under counter bulb burned out and socket was damaged by overheating. How to replace Lamp Holder (Light Socket). OEM part 8206374 was discontinued but there was another part that looked very similar in size and appearance. I ordered it and it worked like a charm. Whirlpool should list this part as a replacement to the part they have discontinued. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes