Lg-microwave-ms3447gr-not-heating, start right here find appliance parts, lawn & garden equipment parts, heating & cooling parts and more from the top brands in the industry here. click on shop parts, or select the kind of product you're working with on the left and we'll help you find the right part. shop parts. Lg get product support for the lg ms3447gr. download ms3447gr manuals, documents, and software. view ms3447gr warranty information and schedule services., lg ms3447gr (microwave): 3.3 out of 5 stars from 18 genuine reviews on australia's largest opinion site productreview.com.au.