Lydia V Loxahatchee , FL December 16, 2014 Appliance: Maytag Microwave - Convection MMV6178AAS Maytag Microwave Mmv6178aas: The ring turn was not working one of the rollers came off. How to replace All Purpose Appliance Cleaner. I called applianceparts, they were very helpful gave me all the info to find the part for my oven, even thought the oven is not available any more, they found the exact part that was compatible with my oven and fits perfect, they even told the warranty is good for one year, am very happy. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes